removed ERFilter (to be moved to opencv_contrib/modules/text) and lineMOD (to be moved to opencv_contrib/modules/rgbd)

put the detection-based tracker back (to objdetect module), so that the Android face detection sample builds fine. The patch by Konstantin Matskevich that adds C++11 threads support has been merged in too. Also, fixed compile error in the doc builder.

removed contrib, legacy and softcsscade modules; removed latentsvm and datamatrix detector from objdetect. removed haartraining and sft apps.
some of the stuff will be moved to opencv_contrib module.
in order to make this PR pass buildbot, please, comment off opencv_legacy, opencv_contrib and opencv_softcascade test runs.

Update system.cpp

Update system.cpp

Update system.cpp

Update matching.cpp

Update matching.cpp

Update system.cpp

Update system.cpp

Update ocl.cpp

Update matching.cpp

Update ocl.cpp

Update matching.cpp

fixed bug reported by Irina K. Also tried to fix LBP detector regression in quality (probably it did not help but still ...)

Original error without the fix:

opencv/modules/objdetect/src/cascadedetect.cpp: In member function 'bool cv::CascadeClassifierImpl::ocl_detectSingleScale(const cv::_InputArray&, cv::Size, int, double, cv::Size)':
/opencv/modules/objdetect/src/cascadedetect.cpp:1215:
error: no matching function for call to 'cv::ocl::Kernel::args(cv::ocl::KernelArg, cv::ocl::KernelArg, cv::ocl::KernelArg, int, cv::ocl::KernelArg, cv::ocl::KernelArg, cv::ocl::KernelArg, cv::Size&, int&, float, cv::Rect&, cv::Size&, cv::CascadeClassifierImpl::<anonymous enum>)'