Updated component packages to add branch-alias

Now that we have per-component repos, we need the ability to install
dev-stability packages. Currently, this can only be done if you specify
dev-master (which is auto-enabled via packagist), but not via dev-develop.
Additionally, you cannot specify version strings like "2.1-dev" or "2.2-dev", as
those aliases do not exist.

This patch adds dev-master and dev-develop aliases for each component.

composer.json

@@ -15,6 +15,12 @@
         "php": ">=5.3.3",
         "zendframework/zend-stdlib": "self.version"
     },
+    "extra": {
+        "branch-alias": {
+            "dev-master": "2.1-dev",
+            "dev-develop": "2.2-dev"
+        }
+    },
     "homepage": "https://github.com/zendframework/zend-progress-bar",
     "autoload-dev": {
         "psr-4": {