Initial commit of ActionBarSherlock conversion. Note:

 * It's ugly at the moment :)
 * Lots of bugs to still sort out with the change of the WPTitleBar to ActionBar
 * You must have ActionBarSherlock downloaded and added to Eclipse as a Library project. Details: http://actionbarsherlock.com/usage.html
 * Started experimenting with UI tweaks to fit in with Holo better: Square gravatars, more padding in lists with no gradient backgrounds
 * Added support for the action bar icons to Posts, Comments and Reader views.
 
 Refs #408

git-svn-id: https://android.svn.wordpress.org/trunk@888 a6565c4b-a94d-4d28-bb26-aa9e5ab542c0