block: add sio/row io sched
block: fix I/O scheduler define, sio/raw
block: add bfq,vr I/O scheduler
Add relese dir
update README.md
Makefile: Update missing... CC_OPTIMIZE_ALOT
Update defcofig
msm_rotator: Fix 'ps0_need' may be used uninitialized
core: fix: 'portstatus' may be used uninitialized
update release tool
Revert "msm_rotator: Fix 'ps0_need' may be used uninitialized"

This reverts commit dc97c0da6cd8874a44e16324aafb5fb45fb62106.
update build-tools
experimental build with linaro gcc 4.8
test add create boot.img shell