moved header file back into project scope
GPUImageMovieWriter: synchronise finishRecording with the movieWritingQueue

As the AVAssetWriter gets started on the movieWritingQueue.

Also ensure that the handler is called async, otherwise it is called on the movieWritingQueue, which is dispatch_sync from the video processing queue, so if the user-code in the handler calls anything that dispatch_syncs to the video processing queue: deadlock.
Merge pull request #1176 from karlvr/movie-writer-finish-sync2

GPUImageMovieWriter: synchronise finishRecording with the movieWritingQueue [resubmit]
Merge pull request #1173 from proth/master

moved header file back into project scope
Fixed two precision issues with the levels and lookup filters.
Added kGPUImageRotateRightFlipHorizontal to the GPUImageRotationMode enum to fix build errors
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
Merge pull request #1199 from andyinabox/master

Fix build errors
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.
I believe this fixes a crash on iOS 4.x, due to a missing GCD function on that OS.
since the delegate call is optional…
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.
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.