Patch code from 'David Bluecame' user forum (yafaray.org/node/468).
Force background alpha 1.0 with non-premultiply renders.
This code seems solved 'background' issues with Blender 2.66
Fix indent in last commit ( use AStyle )
Update from last commit to DarkTide
Error typo in last commit
Merge branch 'master' of https://github.com/povmaniaco/Core

Conflicts:
	src/integrators/directlight.cc
	src/integrators/sppm.cc
	src/yafraycore/imagefilm.cc