temporarily turn off TBB threading when computing SURF descriptors (as the parallel version seems to produce different descriptors on each run)

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

Fairly certain that it builds now.

integrated multi-threaded version of SURF (thanks to imahon and yvo2m for the patch; see ticket #275)

small brief edit, was trying to allow user to pass integral image but this introduced some bugs, so no longer doing this...
for now.

adding the Brief descriptor, associated hamming distance functors for bruteforce matching.  Also adding cout << cv::Mat functions in core.

modified features2d interface; added algorithmic test for DescriptorMatcher; added sample on matching to many images

fixed FernDescriptorMatch; optimized keypoint regions matching in detector/descriptor evaluation; added CalonderDescriptorExtractor to evaluation tests