SWELL: faster blitting on 10.7+, faster Retina blitting -- from 087a7e86, 96731529, 2ccb2f6d
swell-gdi: use the same (display) colorspace for various things -- from 9f6db014
SWELL: removed some redundant color creation code -- from c1635ee0
SWELL: added SWELL_IsRetinaDC() -- from 28e92174
SWELL: added SWELL_IsRetinaHWND() -- from ce2d94c9
EEL_lice: OSX retina support for UIs, use gfx_ext_retina -- from 6151c8db
SWELL: added SWELL_GetOSXVersion() for internal use -- from e167b1cf