GL*, GLContext: Expose isGL2ES3() and getGL2ES3() for convenience.
GLBuffers: Align comment
GLPixelStorageModes: Fix API doc references, Add set[Pack|Unpack]RowLength(GL2ES3 gl, ..)
GLReadBufferUtil.readPixels(..): Use plain int values for inWidth/inHeight, instead int[] - no return value desired.
Gears: Make rotation optional