Added onDispose for call from the base class and GpuMonochrome case to toRaster
Fixed error in isPadded and added channels variable for clarity
Removed space
Fixed error in pack function
Added drawLines function
Adde channels property
Implemented drawLines, added clearColor variable for changing the clear value and scaled the translation when drawing the uv image of the YUV420
Fixed disposing of OpenGL resources
Now sets clearColor to 0.5 when drawing to Uv canvas
Merge branch 'master' of https://github.com/cogneco/ooc-kean
Merge pull request #13 from EmilWestergren/master

Fixed dispose of OpenGL resources and some errors