Refine code for transparent background cases
Commit old patch from 'subcomandante':
    - contain refine code for Oren-Nayar
    - https://github.com/subcomandante/Core/commit/3c8b097c1329e3b93ea5907ed64e7518d307ed6f
Refine flags for int64_t on Mingw32 builds. Tested by paultron
Some style code updates
Fix directory name on CPackConfig.txt
Update asm flags for x64 GCC builds.
Merge branch 'merge_SSS' of https://github.com/TheBounty/Core into merge_SSS

Conflicts:
	include/integrators/sppm.h