* Re-enabled the CUDA cascade classifier support using the openCV4.x FileStorage API.
* Re-enabled the CUDA cascade classifier tests.
Removed line of disabled code from cascade read.
Add python bindings to cudaobjdetect, cudawarping and cudaarithm
* Overload cudawarping functions to generate correct python bindings.
Add python wrapper to convolution funciton.
* Added shift and hog.
* Moved cuda python tests to this repo and added python bindings to SURF.
* Fix SURF documentation and allow meanshiftsegmention to create GpuMat internaly if not passed for python bindings consistency.
* Add correct cuda SURF test case.
* Fix python mog and mog2 python bindings, add tests and correct cudawarping documentation.
* Updated KeyPoints in cuda::ORB::Convert python wrapper to be an output argument.
* Add changes suggested by alalek
* Added changes suggested by asmorkalov
* add -Wno-psabi when using GCC 6
* add -Wundef for CUDA 10
* add -Wdeprecated-declarations when using GCC 7
* add -Wstrict-aliasing and -Wtautological-compare for GCC 7
* replace cudaThreadSynchronize with cudaDeviceSynchronize
original commit: 40c71a2463
