Recommit these filter, pls ignore pre work
Revert "Recommit these filter, pls ignore pre work"

This reverts commit 4885ae3fd15ca994f5a4101eb05c04ce0f9a5a20.
some filter
Merge pull request #12 from dotyso/master

GPUImageExposureFilter, GPUImageHighlightShadowFilter, GPUImageMonochromeFilter, GPUImageOpacityFilter, GPUImageRGBFilter, GPUImageSaturationFilter, GPUImageVignetteFilter, GPUImageWhiteBalanceFilter,