Publish Vulpes Preview 15 sources for desktop, Android and Tundra

Share Gaia assets and adapters, keep private profiles and development documents local, and update both public READMEs.

gaia/apps/email/js/mime_to_class.js

@@ -0,0 +1,13 @@
+'use strict';
+define(function() {
+  /**
+   * Given a mime type, generates a CSS class name that uses just the first part
+   * of the mime type. So, audio/ogg becomes mime-audio.
+   * @param  {String} mimeType
+   * @return {String} a class name usable in CSS.
+   */
+  return function mimeToClass(mimeType) {
+    mimeType = mimeType || '';
+    return 'mime-' + (mimeType.split('/')[0] || '');
+  };
+});