Blender Git Loki

Color management: implemented ability to color manage byte buffers

Color management of byte buffers is currently disabled, to enable
it COLORMANAGE_BYTE_BUFFER from colormanagement.c should be defined.

Currently color management supposes that byte buffer is originally
in sRGB space. Ideally it'll be using the same input color space
setting as float buffer which is still in a TODO list.

It could be nice artistic option to play with. Also in theory it's
possible that byte images would store data in non-sRGB space.

There's still kind of issue with byte buffers which results in
showing linear image when view transform is set to RAW. It'll be
resolved as soon as real input color space is added. Other view
transformations should work fine.