Ported the blend filters to the Mac.
Fixed a crashing bug in the crop filter on iOS.
Ported a few more color adjustment filters to the Mac. Tweaked the way that GPUImageView works on the Mac to support resizing correctly.
Added a multiview test for the Mac. For now, locking focus on views to prevent glitches with multiple NSOpenGLViews on the Mac.
Added the lookup filters. Fixed some things I broke in the last commit on the Mac.
Merge branch 'master' of github.com:BradLarson/GPUImage