Add OS X support to Podspec.
Merge pull request #1402 from calebd/master

Add OS X support to Podspec.
Expose accessors for GPUImageiOSBlurFilter rangeReductionFactor
Added methods for capturing still photos in specific orientation
Check for NaN in colorTracking point to avoid crash when setting phone on desk.
Beginning migration to new framebuffer cache system.
Ripped out my failed attempt at memory conservation, in preparation for the caching mechanism.
Fix KVO on frame for GPUImageView, to improve performance and fix iOS 7 support.
Completely rewrote FBO management to now use an internal cache of FBOs and textures, should have huge impacts on memory usage. Things are kinda broken right now, though.
Repaired picture inputs by adding a type of cached framebuffer consisting only of textures.
Fixed the color attachment comparison bug
Altered image capture pathways to account for new framebuffer caching architecture.
Got the Mac side to build under the new framebuffer caching structure.
Refined cache purging, protected against threading issues, and made the camera rotate itself internally.
Migrated raw data input and outputs to work with the new framebuffer cache.
Manually committed pull request #1453 by cesare-montresor.
Merge pull request #1449 from stelabouras/master

Fixed the color attachment comparison bug
Merge pull request #1432 from charliewilliams/master

Check for NaN in colorTracking point to avoid crash when setting phone on desk
Merge pull request #1412 from heisters/master

Expose accessors for GPUImageiOSBlurFilter rangeReductionFactor
Merge pull request #1438 from bradleyayers/master

Remove KVO on frame for GPUImageView, improves performance and fixes iOS 7 support