Optimized RF, added SSE2 support in RF mode. Changed interface (numIters param moved from filt function to constructor).
Fixed SSE2 support in RF mode. Added precomp.hpp headers.
Merge branch 'master' of github.com:ludv1x/gsoc_opencv_2014

Conflicts:
	opencv_contrib/modules/edgefilter/include/opencv2/DomainTransform.hpp