Removes Gingerbread support. 

Signed-off-by: Jared Woolston <jwoolston@tenkiv.com>
Merge branch 'master' into remove_gingerbread

Conflicts:
	src/rajawali/RajawaliFragmentActivity.java
Merge pull request #611 from Tenkiv/remove_gingerbread

Removes Gingerbread support.
Merge branch 'master' into scenegraph_dev