Added PFM loader

	modified:   ../cvt/util/CPU.h
	modified:   ../plugins/iloader/CMakeLists.txt
	new file:   ../plugins/iloader/PFM/CMakeLists.txt
	new file:   ../plugins/iloader/PFM/PFMLoader.cpp
PseudoHuber loss function

	modified:   cvt/vision/RobustWeighting.h
yosemite ...

	modified:   util/extracttests.sh
Added missing IMinMax files

	new file:   cvt/gfx/IMinMax.cpp
	new file:   cvt/gfx/IMinMax.h
Fix GFX constructor for Drawables

	modified:   ../cvt/gfx/GFX.cpp
Added bswap to SIMD/SIMDSSSE3

	modified:   SIMD.cpp
	modified:   SIMD.h
	modified:   SIMDSSSE3.cpp
	modified:   SIMDSSSE3.h
Added Image::assign

	modified:   ../cvt/gfx/Image.h