Neumann L., Matas J.: Real-Time Scene Text Localization and Recognition, CVPR 2012.

High-level C++ interface and implementation of algorithm is in the objdetect module.
C++ example, a test image, and the default classifiers in xml files.

Pull requests:
	#904 from ograycode:2.4
	#905 from bitwangyaoyao:2.4_TVL1
	#902 from apavlenko:fix_run_py
	#882 from pengx17:2.4_rewrite_query_info

Conflicts:
	modules/nonfree/src/surf.ocl.cpp
	modules/ocl/include/opencv2/ocl/private/util.hpp
	modules/ocl/src/hog.cpp
	modules/ocl/src/pyrlk.cpp
	modules/ocl/src/tvl1flow.cpp

Conflicts:
	modules/ocl/CMakeLists.txt
	modules/ocl/perf/perf_color.cpp
	modules/ocl/perf/perf_match_template.cpp
	modules/ocl/perf/precomp.cpp
	modules/ocl/perf/precomp.hpp

Conflicts:
	3rdparty/libjasper/CMakeLists.txt
	cmake/OpenCVDetectOpenCL.cmake
	modules/calib3d/doc/camera_calibration_and_3d_reconstruction.rst
	modules/imgproc/src/floodfill.cpp
	modules/ocl/include/opencv2/ocl/ocl.hpp
	modules/ocl/src/arithm.cpp
	modules/ocl/src/haar.cpp
	modules/ocl/src/imgproc.cpp
	modules/ocl/src/initialization.cpp
	modules/ocl/src/matrix_operations.cpp
	modules/ocl/src/mcwutil.cpp
	modules/ocl/src/opencl/arithm_bitwise_and_mask.cl
	modules/ocl/src/opencl/arithm_bitwise_and_scalar_mask.cl
	modules/ocl/src/opencl/arithm_bitwise_binary_mask.cl
	modules/ocl/src/opencl/arithm_bitwise_binary_scalar.cl
	modules/ocl/src/opencl/arithm_bitwise_binary_scalar_mask.cl
	modules/ocl/src/opencl/arithm_bitwise_or.cl
	modules/ocl/src/opencl/arithm_bitwise_or_scalar.cl
	modules/ocl/src/opencl/arithm_bitwise_or_scalar_mask.cl
	modules/ocl/src/opencl/arithm_bitwise_xor.cl
	modules/ocl/src/opencl/arithm_bitwise_xor_mask.cl
	modules/ocl/src/opencl/arithm_bitwise_xor_scalar.cl
	modules/ocl/src/stereobm.cpp
	modules/ocl/test/precomp.hpp
	modules/python/src2/api
	modules/ts/src/ts_func.cpp
	samples/gpu/bgfg_segm.cpp

Simple set of the camera index to allow the user to change it after the object has been initialized.

Reverts some changes in b8ed00bd

This adds a similar interface with pure-cpp and gpu versions.

Use predefined OpenCL function to convert integers to floating points.
This is more accurate than before as it enables:
1. saturate cast
2. customized rounding