other kernels now use row scheme
fix
run.py: added --android_env parameter
Added new border types for pyrDown
fixed cv::mixChannels
run.py: propagate OPENCV* env variables only with --android_propagate_opencv_env flag
Added new Intel-optimized 3x3 and 5x5 kernels to medianFilter.cl file and corresponding code to host in smooth.cpp

Only Intel platform and 1 channel images are supported.
Optimize OpenCL LUT function
Use 4 pixels for one unit. Some ocl code refactoring
Optimize OpenCL LUT function
Optimize OpenCL LUT function
Fix some errors
Fix some errors
Optimize openCL version of reduce function
Change buffer cols count from 64 to 32
fix code in the kernel
Fix some errors
Removed useless multiplication by 4
Merge pull request #2792 from SpecLad:merge-2.4
Merge pull request #2793 from alalek:run_android_env