yuga: reorganize and cleanup

Change-Id: Ie76952eb78446de283d46e7c90ed86b13d102fd5
Update extract ramdisk setup

Change-Id: I27489013ec6586b9414454b3f40b64e851e97dbf
yuga: use default branch for all

Change-Id: I1fdcf0d1655046df49fd8471621b581ad7741303
Merge branch 'cm-10.1' of https://github.com/CyanogenMod/android_device_sony_yuga into jb-mr1