Changed HDR effect slightly.
Wrote some shadow mapping code but commented out again.
Modified HDR again.
Changed number of multisampling samples and actually enabled GL_MULTISAMPLE.
Wrote Drawable::EnableAttrib helper function and replaced duplicate code with call to Bind.
Wrote loads of framebuffer and renderbuffer code to support post-processing effects.
Added identity post-processing shader.
Wrote simple sine post-processing shader and updated Game to use it and to increment the offset over time.