merge two video with add blend
clean
fix repeat process movie
fix output texture flip
GPU run on com.YOUKU.GPUImage.openGLESContextQueue
prepare to add GPUFramebuffer
add GPUFramebuffer
fix runSynchronouslyOnVideoProcessingQueue deadlock
fix
two input filter
three input filter
add GPULineFilter
fix
add GPUGridFilter
add Transform Filter
add GPUGridFilter transform with Y
clean GPUView
add switch of Transform