Also, I made a separate macro for the current function name, which
helps simplify a lot of code that uses it.

Conflicts:
	modules/core/include/opencv2/core/cuda.hpp
	modules/cudacodec/src/thread.cpp
	modules/cudacodec/src/thread.hpp
	modules/superres/perf/perf_superres.cpp
	modules/superres/src/btv_l1_cuda.cpp
	modules/superres/src/optical_flow.cpp
	modules/videostab/src/global_motion.cpp
	modules/videostab/src/inpainting.cpp
	samples/cpp/stitching_detailed.cpp
	samples/cpp/videostab.cpp
	samples/gpu/stereo_multi.cpp

Made all STL usages explicit to be able automatically find all usages of
particular class or function.

This reverts commit 94b97b7a.

Changed DetectionBasedTracker a bit to make its method addObject to return an integer value -- the id of the new added object.

Added possibility in the class DetectionBasedTracker to work as a tracker only -- without the mainDetector. 
In this case new objects will be added into it by the method addObject(const cv::Rect& location).

revision 8721 vas merged to head. Detection based tracker interface changed. cpp and android samples updated.

Warning: changes beak binary compatibility

Added a check of the DetectionBasedTracker's inner state in the main thread function of this class. 
This change should fix a multithread bug in the class.

Changed the class DetectionBasedTracker -- changed the system of states in the subclass DetectionBasedTracker::SeparateDetectionWork, made them more logical.