Add ocl version of boxFilter to the module img_proc
Fix issue in boxFilter with destination depth not equal to source depth.
Add check for depths of destination and source image. Fix warning C4127.
Another fix for disable "conditional expression is constant"
Change while(true) to for(;;) for fix compiler warning.
--no-display property fix in stereo_match.cpp sample
DescriptorExtractor: added defaultNorm() to return default norm type.

Added the defaultNorm() method to the DescriptorExtractor class. This method returns the default norm type for each descriptor type. The tests and C/C++ samples were updated to get the norm type directly from the DescriptorExtractor inherited classes.

This was reported in feature report #2182 (http://code.opencv.org/issues/2182). It will make it possible to get the norm type usually applied matching method for each descriptor, instead of passing it manually.
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
Fix problems with border extrapolation in kernel. Add Isolated/Nonisolated borders.
core: added TLS support
ocl: implemented per-thread OpenCL command queue
Merge pull request #1975 from magomimmo:clj-tut