Added readPixels function
Implemented toRaster function and corrected wrong stride calculation
Implemented toRaster function and changed create function
Implemented readPixels function
Changed name of function to readPixels and changed parameters
Moved Quad creation to constructor
Added constructors for creating from existing subimages
Added GpuImageBin
Merge branch 'master' of https://github.com/cogneco/ooc-kean
Moved all shaders to the Gpu context
Changed so inversion of Y-axis only is applied when drawing to a window
Removed comments
Merge pull request #8 from EmilWestergren/master

Implemented toRaster function in classes