Reset Manifest with Lolipop Sources (CM12)

This will reset manifest to clean cm12 sources : will be trianglized later
* Preliminary cm12 manifest
* Remove device trees.
* Switch to our bionic 
* Moar repo forks
* Update doc to use cm-12.0 instead of 11.0 for cm-12.0 branch 
* Update manifest for cm-12.0 
* Remove hardware/qcom/power
* Remove QCOM sensors repo 
* Set up QCOM HAL variants