fixed border processing bayer2rgb & bayer2gray; made the test "color-bayer" pass; renamed CV_Bayer*2Gray -> CV_Bayer*2GRAY for consistency

"descriptor-opponent-sift",       //ticket 737
"_3d-rodrigues",                  //ticket 435

added tests for some detectors; made features2d object create functions as static classes methods; fixed OpponentColorDescriptorExtractor, BriefDescriptorExtractor (on rgb); renamed DynamicDetector

fixed canny test; fixed mhi-global test & implementation (hopefully, for the last time); added sse 4.1 & 4.2 support (not working in Xcode for some reason); moved splineInterpolation to color.cpp; fixed a few bugs in documentation

mhi-global                   //ticket 457
canny                          //ticket 702

filter-generic - ticket 690
mhi-global - ticket 457

fixed issue 689

warp-affine                     //ticket 572
warp-perspective            //ticket 575
segmentation-grabcut    //ticket 666
_3d-fundam                     //ticket 434
posit                               //ticket 430

increased number of points in optflow-estimate-rigid test, because in the presense of noise there should be enough points for robust transform estimation