Adding [self recalculateViewGeometry]; to improve rotation of a GPUImageView. Now coordinates will be updated on rotation.
Giving GPUImageMovieWriter’s caller access to isRecording and movieURL by making them properties.
Taking into account pre-multiplied alpha in the second image for GPUImageAlphaBlendFilter. Fixes: text aliasing issues with GPUImageAlphaBlendFilter. See post: http://stackoverflow.com/questions/15934381/aliasing-issue-with-gpuimageview
merging with BradLarson/GPUImage master