Merge pull request #5 from CyberAgent/develop

Develop
Create GPUImageBoxBlurFilter.java
Create GPUImageCGAColorspaceFilter.java
Create GPUImageDilationFilter.java
Create GPUImageKuwaharaFilter.java
Create GPUImageRGBDilationFilter.java
Create GPUImageSketchFilter.java
Create GPUImageToonFilter.java
Merge pull request #36 from javierpuntonet/develop

BoxBlur, CGA, Dilation, Kuwahara, RGBDilation, Sketch, Toon