Added SharedPreferencesCompat.
Minor changes.
Added HashUtils.getHashCode(byte[]).
Updated experiment framework to send more device information to the server and support saving/restoring of the experiment data to SharedPreferences.
Added possibility to ExperimentManager to save blocking or not blocking to SharedPreferences.
Fixed wrong method call in TiledTextureRegion.setTextureX (thx to GitHubDemon).
Merge branch 'GLES2-AnchorCenter' of git://github.com/nicolasgramlich/AndEngine into GLES2-AnchorCenter