Cycles OpenCL: disable requirement of enabling Experimental, environment varibale
already adds an extra step. Also list all features for OpenCL AMD to make testing
easier.

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@57086 954f8c5b-7b00-dc11-b283-0030488c597c
QTKIT: as per Ideasman's suggestion, include BLI_utildefines.h in sourcefiles where needed and reorder (must be before BKE_global.h)

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@57087 954f8c5b-7b00-dc11-b283-0030488c597c