Initial v21 appcompat support:

 * Uses Toolbar in place of ActionBar
 * Killed simonVT menu drawer! Now uses appcompat menu drawer
Show menu drawer on top of toolbar.
Merge branch 'develop' into feature/material-appcompat
All Activities now extend AppCompat's ActionBarActivity.

Made Calypso.NoActionBar theme for activities that use the menu drawer w/ toolbar.
Fixes search bar in Media
Fixes search in Themes activity.
Use getSupportActionBar() in ThemeBrowserActivity
Fixes fragment navigation in PostsActivity.
SignInActivity doesn't need to extend ActionBarActivity
Fixes fragment navigation in nav drawer activities.

ViewSiteActivity is still broken.
Switch back to `note20` bucket for Simperium.
replace Chris Banes' PullToRefresh by the native SwipeToRefresh view
replace Chris Banes' PullToRefresh by the native SwipeToRefresh in the main project
Merge branch 'feature/material-appcompat' of github.com:wordpress-mobile/WordPress-Android into feature/material-appcompat

Conflicts:
	WordPress/src/main/java/org/wordpress/android/ui/stats/StatsDetailsActivity.java
First pass at replacing the Reader's ActionBar tag dropdown with a toolbar spinner
2nd pass at toolbar spinner in reader
3rd pass at toolbar spinner in reader
fix circle spinner color style
remove unused viewClass in PTR constructor
rename PullToRefresh to SwipeToRefresh