Support Library update
Implementing ActionBarHelper and ActionBarUpIndicator
Added ActionBarSlideIcon
ActionBarHelper: Nullpointer fix
Slide the icon works now
Creating ActionBarSlideIcon from xml attributes
ActionBarSlideIcon: read xml attributes
README: added ActionBarSlideIcon example
Merge jfeinstein10 branch with sockeqwe.

sockeqwe provided slideable icon like ActionBarDrawerToggle has, but jfeinstein10 hasn't merged it to the mainline yet.