Revert "Revert "Remove ABS from SlidingMenu. ABS has resource conflicts with AndroidSupportLib. Google recommendation is to use support library v7 for ActionBar backwards compatibility instead of ABS.""

This reverts commit cc21b1f375818b0538e0206880082321b4f487c1.
Merge pull request #4 from GreatCall-Android/feature/replace_abs

Remove ABS from SlidingMenu.