* actually added the iOS target to oclraster.xcodeproj (static lib)
 * fixed a few remaining iOS issues and cleaned up some code (upscaling support; better framebuffer blit/draw code)
 * hauled in touch event handling/support from a2elight
 * fixed compilation with OpenCL 1.1 (CL_MAP_WRITE_INVALIDATE_REGION is not supported, use CL_MAP_WRITE instead)
 * added touch event handler to oclr_simple sample (just cycles through the material sets for now)
 * in oclr_simple sample: when transforming the model, cycle through the materials sets after one full rotation around the y-axis
 * updated README with new progress screenshots