Fixed bingRenderBuffer added checkAllErrors flag.

bindRenderBuffer was setting framebuffer instead of render buffer. Added new public flag checkAllErrors,
if set it will print any glGetError errors after each call. This is slow, but helps a lot when debugging problems.

Change-Id: I7450df5c7822d3f6c47127d4f7a163696838fb68
Reviewed-by: Pasi Keränen <pasi.keranen@digia.com>