links, disable downloads, alert package manager downloads

_config.yml

@@ -28,9 +28,8 @@ sass_repo:        https://github.com/twbs/bootstrap-sass
 slack:            https://bootstrap-slack.herokuapp.com
 
 download:
-  source:         https://github.com/twbs/bootstrap/archive/v3.3.5.zip
-  dist:           https://github.com/twbs/bootstrap/releases/download/v3.3.5/bootstrap-3.3.5-dist.zip
-  sass:           https://github.com/twbs/bootstrap-sass/archive/v3.3.5.tar.gz
+  source:         https://github.com/twbs/bootstrap/archive/v4.0.0-alpha.zip
+  dist:           https://github.com/twbs/bootstrap/releases/download/v4.0.0-alpha/bootstrap-4.0.0-alpha-dist.zip
 
 blog:             http://blog.getbootstrap.com
 expo:             http://expo.getbootstrap.com

docs/getting-started/download.md

@@ -12,7 +12,10 @@ group: getting-started
 ### Compiled
 Download just the compiled and minified CSS and JavaScript. Doesn't include any documentation or original source files.
 
+{% comment %}
 <a href="{{ site.download.dist }}" class="btn btn-bs btn-outline" onclick="ga('send', 'event', 'Getting started', 'Download', 'Download compiled');">Download Bootstrap</a>
+{% endcomment %}
+<span class="text-muted">Coming soon!</span>
 {% endmarkdown %}
   </div>
   <div class="col-sm-6">
@@ -29,6 +32,10 @@ Download everything: source Sass, JavaScript, and documentation files. **Require
 
 Pull in Bootstrap's **source files** into nearly any project with some of the most popular package managers. No matter the package manager, Bootstrap will **require a Sass compiler and [Autoprefixer](https://github.com/postcss/autoprefixer)** for a setup that matches our official compiled versions.
 
+{% callout warning %}
+**Heads up!** Not all package managers have the v4 alpha published yet, but we should have them up shortly!
+{% endcallout %}
+
 ### Bower
 
 Install and manage Bootstrap's Sass and JavaScript using [Bower](http://bower.io).