grouper: custom -> omni

Change-Id: Ie42446c13c3c213ce55eadcd7973d5828bada1f2
Add extract files scripts

Change-Id: I01a40c090fad6902a39cdd12a69ee29e165177e0
Merge pull request #2 from omnirom/android-4.3

:)
Merge pull request #1 from Klozz/android-4.3

Request