GPUImage up to 0.1.2.
fix blur size property removed from gpuimage.

gpuimage has removed blurSize property, I just change it to the new one
in order to work with the last stable gpuimage release, 0.1.2. See the
issue reported here:
https://github.com/gobackspaces/DLCImagePickerController/issues/45.
Merge pull request #51 from nebiros/master

fix blur size property removed from gpuimage.