Worked on authentication stuff

modified:   app/assets/stylesheets/_layout.css.scss
new file:   app/assets/stylesheets/_login_control.css.scss
modified:   app/assets/stylesheets/application.css.scss
modified:   app/assets/templates/accounts_sign_in.html
modified:   app/controllers/api/callbacks_controller.rb
modified:   app/views/layouts/application.html.erb
new file:   lib/assets/javascripts/angular-http-auth.js
modified:   lib/assets/javascripts/functions.js
new file:   app/assets/images/angular-auth/content_repeat.jpg
new file:   app/assets/images/angular-auth/loading.gif
new file:   app/assets/images/provider/auth-buttons.css.scss
new file:   app/assets/images/provider/auth-icons.png
new file:   app/assets/images/provider/facebook_48.png
new file:   app/assets/images/provider/google_48.png
new file:   app/assets/images/provider/openid_48.png
new file:   app/assets/images/provider/persona-buttons.css.scss
new file:   app/assets/images/provider/persona_sign_in_blue.png
new file:   app/assets/images/provider/twitter_48.png
new file:   app/assets/images/provider/windows_live_48.png
new file:   app/assets/images/provider/yahoo_48.png

new file:   app/assets/javascripts/angular/auth.js
modified:   app/assets/javascripts/angular/controllers/listen.js
new file:   app/assets/javascripts/angular/controllers/navigation.js
modified:   app/assets/javascripts/angular/services/services.js

new file:   app/assets/templates/attributions.html
modified:   app/assets/javascripts/app.js
	-- added attribution route and page

modified:   app/assets/stylesheets/_base.css.scss
	-- added generators for gradients and rouded corners

app/assets/images/provider/auth-buttons.css.scss

@@ -0,0 +1,376 @@
+/*
+ * Button Object
+ */
+
+/*
+ * 1. Corrects inability to style clickable 'input' types in iOS
+ * 2. Remove excess padding in IE6/7
+ * 3. IE6/7 inline-block hack for native block-level elements
+ */
+
+.btn-auth {
+    position: relative;
+    display: inline-block;
+    height: 22px;
+    padding: 0 1em;
+    border: 1px solid #999;
+    border-radius: 2px;
+    margin: 0;
+    text-align: center;
+    text-decoration: none;
+    font-size: 14px;
+    line-height: 22px;
+    white-space: nowrap;
+    cursor: pointer;
+    color: #222;
+    background: #fff;
+    -webkit-box-sizing: content-box;
+    -moz-box-sizing: content-box;
+    box-sizing: content-box;
+    /* iOS */
+    -webkit-appearance: none; /* 1 */
+    /* IE6/7 hacks */
+    *overflow: visible;  /* 2 */
+    *display: inline; /* 3 */
+    *zoom: 1; /* 3 */
+}
+
+.btn-auth:hover,
+.btn-auth:focus,
+.btn-auth:active {
+    color: #222;
+    text-decoration: none;
+}
+
+.btn-auth:before {
+    content: "";
+    float: left;
+    width: 22px;
+    height: 22px;
+    background: image-url("provider/auth-icons.png") no-repeat 99px 99px;
+}
+
+/*
+ * 36px
+ */
+
+.btn-auth.large {
+    height: 36px;
+    line-height: 36px;
+    font-size: 20px;
+}
+
+.btn-auth.large:before {
+    width: 36px;
+    height: 36px;
+}
+
+/*
+ * Remove excess padding and border in FF3+
+ */
+
+.btn-auth::-moz-focus-inner {
+    border: 0;
+    padding: 0;
+}
+
+
+/* Facebook (extends .btn-auth)
+   ========================================================================== */
+
+.btn-facebook {
+    border-color: #29447e;
+    border-bottom-color: #1a356e;
+    color: #fff;
+    background-color: #5872a7;
+    background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#637bad), to(#5872a7));
+    background-image: -webkit-linear-gradient(#637bad, #5872a7);
+    background-image: -moz-linear-gradient(#637bad, #5872a7);
+    background-image: -ms-linear-gradient(#637bad, #5872a7);
+    background-image: -o-linear-gradient(#637bad, #5872a7);
+    background-image: linear-gradient(#637bad, #5872a7);
+    -webkit-box-shadow: inset 0 1px 0 #879ac0;
+    box-shadow: inset 0 1px 0 #879ac0;
+}
+
+.btn-facebook:hover,
+.btn-facebook:focus {
+    color: #fff;
+    background-color: #3b5998;
+}
+
+.btn-facebook:active {
+    color: #fff;
+    background: #4f6aa3;
+    -webkit-box-shadow: inset 0 1px 0 #45619d;
+    box-shadow: inset 0 1px 0 #45619d;
+}
+
+/*
+ * Icon
+ */
+
+.btn-facebook:before {
+    border-right: 1px solid #465f94;
+    margin: 0 1em 0 -1em;
+    background-position: 0 0;
+}
+
+.btn-facebook.large:before {
+    background-position: 0 -22px;
+}
+
+
+/* GitHub
+   ========================================================================== */
+
+.btn-github {
+    border-color: #d4d4d4;
+    background: #ececec;
+    background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#f4f4f4), to(#ececec));
+    background-image: -webkit-linear-gradient(#f4f4f4, #ececec);
+    background-image: -moz-linear-gradient(#f4f4f4, #ececec);
+    background-image: -ms-linear-gradient(#f4f4f4, #ececec);
+    background-image: -o-linear-gradient(#f4f4f4, #ececec);
+    background-image: linear-gradient(#f4f4f4, #ececec);
+}
+
+.btn-github:hover,
+.btn-github:focus {
+    border-color: #518cc6;
+    border-bottom-color: #2a65a0;
+    color: #fff;
+    background-color: #599bdc;
+    background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#599bdc), to(#3072b3));
+    background-image: -webkit-linear-gradient(#599bdc, #3072b3);
+    background-image: -moz-linear-gradient(#599bdc, #3072b3);
+    background-image: -ms-linear-gradient(#599bdc, #3072b3);
+    background-image: -o-linear-gradient(#599bdc, #3072b3);
+    background-image: linear-gradient(#599bdc, #3072b3);
+}
+
+.btn-github:active {
+    border-color: #2A65A0;
+    border-bottom-color: #518CC6;
+    color: #fff;
+    background: #3072B3;
+    background: -webkit-gradient(linear, 0 0, 0 100%, from(#3072b3), to(#599bdc));
+    background: -webkit-linear-gradient(#3072b3, #599bdc);
+    background: -moz-linear-gradient(#3072b3, #599bdc);
+    background: -ms-linear-gradient(#3072b3, #599bdc);
+    background: -o-linear-gradient(#3072b3, #599bdc);
+    background: linear-gradient(#3072b3, #599bdc);
+}
+
+/*
+ * Icon
+ */
+
+.btn-github:before {
+    margin: 0 0.6em 0 -0.6em;
+    background-position: -44px 0;
+}
+
+.btn-github:hover:before,
+.btn-github:focus:before,
+.btn-github:active:before {
+    background-position: -66px 0;
+}
+
+.btn-github.large:before {
+    background-position: -72px -22px;
+}
+
+.btn-github.large:hover:before,
+.btn-github.large:focus:before,
+.btn-github.large:active:before {
+    background-position: -108px -22px;
+}
+
+
+/* Google
+   ========================================================================== */
+
+.btn-google {
+    border-color: #3079ed;
+    color: #fff;
+    background: #4787ed;
+    background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#4d90fe), to(#4787ed));
+    background-image: -webkit-linear-gradient(#4d90fe, #4787ed);
+    background-image: -moz-linear-gradient(#4d90fe, #4787ed);
+    background-image: -ms-linear-gradient(#4d90fe, #4787ed);
+    background-image: -o-linear-gradient(#4d90fe, #4787ed);
+    background-image: linear-gradient(#4d90fe, #4787ed);
+}
+
+.btn-google:hover,
+.btn-google:focus,
+.btn-google:active {
+    color: #fff;
+    background-color: #357ae8;
+    background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#4d90fe), to(#357ae8));
+    background-image: -webkit-linear-gradient(#4d90fe, #357ae8);
+    background-image: -moz-linear-gradient(#4d90fe, #357ae8);
+    background-image: -ms-linear-gradient(#4d90fe, #357ae8);
+    background-image: -o-linear-gradient(#4d90fe, #357ae8);
+    background-image: linear-gradient(#4d90fe, #357ae8);
+}
+
+.btn-google:active {
+    -webkit-box-shadow: inset 0 1px 2px rgba(0,0,0,0.3);
+    box-shadow: inset 0 1px 2px rgba(0,0,0,0.3);
+}
+
+/*
+ * Icon
+ */
+
+.btn-google:before {
+    margin: 0 1em 0 -1em;
+    background-position: -88px 0;
+    background-color: #e6e6e6;
+}
+
+.btn-google.large:before {
+    background-position: -144px -22px;
+}
+
+
+/* Open ID
+   ========================================================================== */
+
+.btn-openid:hover,
+.btn-openid:focus {
+    border-color: #777;
+    background: #fcfcfc;
+}
+
+.btn-openid:active {
+    background: #f5f5f5;
+}
+
+/*
+ * Icon
+ */
+
+.btn-openid:before {
+    margin: 0 0.6em 0 -0.6em;
+    background-position: -154px 0;
+}
+
+.btn-openid.large:before {
+    background-position: -252px -22px;
+}
+
+
+/* Twitter
+   ========================================================================== */
+
+.btn-twitter {
+    border-color: #a6cde6;
+    color: #327695;
+    background: #cfe4f0;
+    /* css3 */
+    background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#f1f5f7), to(rgba(255,255,255,0)));
+    background-image: -webkit-linear-gradient(#f1f5f7, rgba(255,255,255,0));
+    background-image: -moz-linear-gradient(#f1f5f7, rgba(255,255,255,0));
+    background-image: -ms-linear-gradient(#f1f5f7, rgba(255,255,255,0));
+    background-image: -o-linear-gradient(#f1f5f7, rgba(255,255,255,0));
+    background-image: linear-gradient(#f1f5f7, rgba(255,255,255,0));
+    -webkit-box-shadow: inset 0 1px 0 #fff;
+    box-shadow: inset 0 1px 0 #fff;
+}
+
+.btn-twitter:hover,
+.btn-twitter:focus,
+.btn-twitter:active {
+    color: #327695;    
+    border-color: #8dc2e4;
+    background-color: #cadde9;
+}
+
+.btn-twitter:active {
+    background: #cadde9;
+    -webkit-box-shadow: inset 0 1px 0 #bbd6e7;
+    box-shadow: inset 0 1px 0 #bbd6e7;
+}
+
+/*
+ * Icon
+ */
+
+.btn-twitter:before {
+    margin: 0 0.6em 0 -0.6em;
+    background-position: -22px 0;
+}
+
+.btn-twitter.large:before {
+    background-position: -36px -22px;
+}
+
+
+/* Windows Live ID
+   ========================================================================== */
+
+.btn-windows:hover,
+.btn-windows:focus {
+    border-color: #777;
+    background: #fcfcfc;
+}
+
+.btn-windows:active {
+    background: #f5f5f5;
+}
+
+/*
+ * Icon
+ */
+
+.btn-windows:before {
+    margin: 0 0.6em 0 -0.6em;
+    background-position: -110px 0;
+}
+
+.btn-windows.large:before {
+    background-position: -180px -22px;
+}
+
+
+/* Yahoo!
+   ========================================================================== */
+
+.btn-yahoo {
+    border-color: #ffb305;
+    background: #ffc426;
+    background-image: -webkit-gradient(linear, 0 0, 0 100%, from(rgba(255,255,255,0.5)), to(rgba(255,255,255,0)));
+    background-image: -webkit-linear-gradient(rgba(255,255,255,0.5), rgba(255,255,255,0));
+    background-image: -moz-linear-gradient(rgba(255,255,255,0.5), rgba(255,255,255,0));
+    background-image: -ms-linear-gradient(rgba(255,255,255,0.5), rgba(255,255,255,0));
+    background-image: -o-linear-gradient(rgba(255,255,255,0.5), rgba(255,255,255,0));
+    background-image: linear-gradient(rgba(255,255,255,0.5), rgba(255,255,255,0));
+}
+
+.btn-yahoo:hover,
+.btn-yahoo:focus {
+    background-color: #fabf20;
+}
+
+.btn-yahoo:active {
+    border-color: #f09700;
+    background-image: none;
+    -webkit-box-shadow: inset 0 1px 1px rgba(0,0,0,0.3);
+    box-shadow: inset 0 1px 1px rgba(0,0,0,0.3);
+}
+
+/*
+ * Icon
+ */
+
+.btn-yahoo:before {
+    margin: 0 0.6em 0 -0.6em;
+    background-position: -132px 0;
+}
+
+.btn-yahoo.large:before {
+    background-position: -216px -22px;
+}