Support for different hardware + temporal tiling

Added support for different settings depending on the hardware
(including single thread mode for iPhone 4).

Added temporal tiling of the tiled threshold mode (the number of tiles
changes each frame). This seems to work well on iPhone 4+5.
Merge branch 'master' of https://github.com/horizon-institute/aestheticodes-ios

Conflicts:
	Views/MarkerCamera.mm
(I already copy/pasted the changes of ktg’s previous commit into my
code)