ROM Editing
* http://forum.xda-developers.com/galaxy-s2/general/ref-unpacking-repacking-stock-rom-img-t1081239
* http://forum.xda-developers.com/showpost.php?p=55937579&postcount=241
* https://android.googlesource.com/platform/system/extras/+/master/ext4_utils/
* http://forum.xda-developers.com/showthread.php?t=2446269
* http://crampstory.tistory.com/32“>http://crampstory.tistory.com/32
Professional
* http://forum.xda-developers.com/galaxy-s4/themes-apps/systemui-overlays-5-0-t3025183
* http://forum.xda-developers.com/android/apps-games/official-layers-bitsyko-apps-rro-t3012172
* http://developer.sonymobile.com/2014/04/22/sony-contributes-runtime-resource-overlay-framework-to-android-code-example/