Build static library using iOS SDK 7
Project settings to enable 64 bit builds

Requires setting the minimum deployment target to 6.0. This is probably not acceptable. I'm not sure what to do here; create multiple targets?
Data type and casting fixes for compiling as 64 bit
GPUImageMovieWriter now obeys its inputRotation.

This appears to simply correct the issue of the movie being written with the wrong orientation. We no longer need to use a dummy filter to correct the orientation.
Fixed #if line for iOS7. Previous version occurs memory leaking on iOS7, because there wasn't called dispatch_release(imageUpdateSemaphore) and libdispatch.dylib's malloc wasn't released.
Fixes iOS7 runtime warnings: Deprecated methods setVideoMinFrameDuration/setVideoMaxFrameDuration for AVCaptureConnection class
Merge pull request #1208 from karlvr/movie-writer-rotation

GPUImageMovieWriter now obeys its inputRotation.
Merge pull request #1232 from jakeva/master

since the delegate callback is optional…
Merge pull request #1235 from reigndesign/upstream

Fixes iOS7 runtime warnings: Deprecated methods
Merge pull request #1200 from karlvr/xcode5

Xcode 5 and 64 bit support
Removed the default building for 64-bit, because that limits backwards compatibility. The framework supports 64-bit, but you'll have to enable this for your project in the framework and your application yourself.
Fix Xcode 4 compatibility
Apply Xcode 5 suggested changes to projects
ShowcaseFilterViewController: Avoid retaining self inside blocks
GPUImageHSBFilter: Comment-out unused functions
GPUImagePicture: don't redraw using CoreGraphics unless you have to

There was support for this but it appeared to have been disabled.
Completely reworked the Gaussian blur filter to use optimized, on-the-fly calculated shaders. This uses the techniques of the Fast Blur filter, so it is no longer necessary and has been removed.
Expanded Gaussian shader generator to support kernels beyond the limit of OpenGL ES varyings, using dependent texture reads after that.
Reworked the box blur in the same fashion as the new Gaussian blur, so it is now truly smooth across various radii.
Restructured the interfaces of classes relying on the blurs to use the new parameters. This will break anything using these classes, so you might want to read up on what the new parameters do.