Ported the corner and line detectors to the Mac. Fixed a glitch in the line detector.
Added alpha support to the RGB and polka dot filters.
Ported the buffer-based filters to the Mac, although I need to fix the motion detector display.
Ported the remaining filters to the Mac. Dramatically improved quality of the Gaussian blur by fixing an idiotic swap of texel offsets that I had in there for most of a year.
bugfix
Merge pull request #986 from DrMoriarty/upstream

Trivial bugfix
Attempting to protect against improper deallocation of resources outside of the image processing OpenGL ES context.
Merge remote-tracking branch 'bradlarson/master'

Update with the original so that works efficiently