fix the channel 3 bug in matrix operation
perf and buf fix for LUT haardetect convertC3C4 resize warpaffine copytom settom
add convovle
remove stereo

Issue #2345 Adapt OpenCV Manager UI for different screen resolution partially fixed. Layout for small resolution added.
Layout for small display resolution added.

fixed iterations>1 case in morphological operations
fixed possible access violation in HSV2RGB
fixed the case learningRate==0 in BackgroundSubtractorMOG2

fixed iterations>1 case in morphological operations (bug #2348; thanks to Andrei Zaharescu for the fix)

Should now automatically detect it during Android build

The labels of a model are now cloned instead of using Mat::copyTo, because Mat::copyTo leads to a crash with the Python wrapper. I need to further investigate it.

Added a simple CMakeLists.txt to the facerec_samples, which are not included in the samples folder. Makes building these samples a lot easier.