GPUImageToneCurveFilter # initWithACVData added
Changes to fix incorrect release of filter's target.
Merge branch 'master' of git://github.com/BradLarson/GPUImage
added two input 3x3 texture sampling filter
two input 3x3 texture sampling filter now samples a 3x3 window for both textures
added approximate poisson image blending
fixed poisson equation bug
added comment about number of poisson iterations
Merge branch 'master' of https://github.com/iansimon/GPUImage

Conflicts:
	framework/GPUImage.xcodeproj/project.pbxproj
	framework/Source/GPUImage.h
Removing warnings under Xcode 4.6

Signed-off-by: Daniel Garcia <fillito@gmail.com>
Removing warnings under Xcode 4.6

Signed-off-by: Daniel Garcia <fillito@gmail.com>
Merge pull request #805 from minube/pull_request/removing_xcode_warnings

Removing warnings under Xcode 4.6
Beginning to add some icons to the project.
Merge branch 'master' of git://github.com/BradLarson/GPUImage
Added icons to all of the sample applications. I was getting bored with white squares.
Add `finishRecording` method with completion block (with backward compatibility)

iOS 6 SDK and higher: If writer responds to async method, call it, otherwise call synchronous method and completion handler.
iOS 5 SDK and lower: Call only synchronous method and completion handler. The rest should not be even compiled.
Fix case of nil completion handler, `AVAssetWriter` does not accept it.
Fixing FBO size when it should return zero-sized value.
Fixing crash if effect's target was nil.
last updates to examples and merge resolving