--no-display property fix in stereo_match.cpp sample
Merge pull request #1959 from botverse:2.4
Fixing some indentation issues on FREAK source file.
add Mimmo Cosenza to Authors
add clojure sample
add clojure logo
add clojure tutorial
add tutorial content
remove Daniele
Merge pull request #1968 from pentschev:fix_indentation_freak_2.4
core: added TLS support
ocl: implemented per-thread OpenCL command queue
Merge pull request #1975 from magomimmo:clj-tut
Merge pull request #1976 from alalek:ocl_multiple_command_queues
ocl: add support for initialization from user-provided OpenCL handles
Merge pull request #1980 from alalek:ocl_interop_initialization
fixed init of clCxt
Merge pull request #1990 from AD-530:Issue3164
Merge remote-tracking branch 'origin/2.4' into merge-2.4

Conflicts:
	doc/tutorials/definitions/tocDefinitions.rst
	modules/core/include/opencv2/core/core.hpp
	modules/core/src/system.cpp
	modules/features2d/src/freak.cpp
	modules/ocl/include/opencv2/ocl/ocl.hpp
	modules/ocl/src/cl_context.cpp
	modules/ocl/test/test_api.cpp
Fixed build for the TLS-related stuff.