Attempt at fixing bug 3186
removed needless arithm_2_mat.cl file
marked some methods of ocl::Context as const
refactored and extended arithm operations add/sub/mul/div/absdiff
removed ocl::magnitudeSqr
removed comments from filtering.cpp and imgproc.cpp in ocl module
refactored and extended ocl::LUT
refactored and extended ocl::addWeighted
refactored and extended binary bitwise operations
refactored and extended ocl::compare
refactored and extended ocl::exp and ocl::log
refactoed and extended ocl::transpose
refactored arithm.cpp. Extended param list for all the tests
removed arithm_absdiff.cl
reverted and generalized original ocl::transpose
fixed minMaxLoc kernel (removed compilation errors)
replaced manually new/delete by AutoBuffer
changes in OpenCL matrix operations docs
Merge pull request #1464 from StevenPuttemans:bugfix_3186_second
Merge pull request #1503 from ilya-lavrenov:ocl_arithm