Use android_sdk repository on Github

Change-Id: I04bae5df9ab34112297983ba921cfc16487dfe3c
Add manifest for 10.1-M1

Change-Id: I4103d4331d5c63087612a63596b67e3ec85c0056
Merge branch 'cm-10.1' of git://github.com/CyanogenMod/android into cm-10.1