fixed cv::warpPerspective
Merge pull request #2779 from pemmanuelviel:kmeansppSquareDist
Merge pull request #2726 from Ilya-Krylov:2.4
Merge pull request #2850 from Sekunde:master
Merge pull request #2845 from shaibagon:patch-1
Merge pull request #2828 from otsedom:updating_and_adding_haarcascades_mcs
Merge pull request #2799 from 23pointsNorth:patch-1
Merge pull request #2784 from saree90:bugfix_Simplex
Merge pull request #2783 from daferna2:master
Bugfix: Memory leak in deletion of er_stack nodes of ERFilter.
Removed "CV_" prefix from constants in docs

The `calib3d.hpp` has a definition of the constant that does not contain the prefix "CV_".
The affected methods were `findHomography` and `findEssentialMat`.
Now the documentation updates the definition of the constants to conform to the header.
Don't build CUDA modules stubs by default (use `-DBUILD_CUDA_STUBS=ON` if need them)
invoking OCL before IPP
Remove pre_invalid parameter
Merge pull request #2855 from ilya-lavrenov:tapi_warpp_fix
Merge pull request #2865 from ilya-lavrenov:morph
optimized cv::setIdentity
Fix typos
Join kernel code for int and float destination types
fixed usage of reshape