Added make_point_list kernel
Added fill_accum kernel
Added getLines, fill_accum_local kernels
Added accuracy tests with real and generated data
Refactoring, minor optimization
Optimization for getLines
Refactoring and optimization
Added HoughLinesP OCL implementation
fix photo::cloning::IlluminationChange when IPP is used
change masking to patchNaNs
Exposing the FAST detector threshold for ORB

Implemented as a new optional parameter for
the constructor of the ORB detector. The
change of this parameter has been included
in the orb unit test.
neon
change remaining c-api CV_ prefixes in constants
opencv_version
update gen_javadoc prints to python3 syntax fixed #3768
Optimization for HoughLinesP
small change in description for Gemm
Used checking norm of results for LPSolver accuracy tests
Add code for print errors of OpenCL kernels runing
Merge pull request #3321 from vbystricky:oclShowRunErrors