Affected functions surf.ocl, pyrlk.ocl and hog.ocl are updated with the change.

1. Added more sync to reduction.
2. Turned off Image2D feature. Probably its support is not detected correctly.
3. Temporary disabled descriptor tests - can't localize a problem of the ocl descriptor.

e.g. <opencv2/core/core.hpp> become <opencv2/core.hpp>

Also renamed <opencv2/core/opengl_interop.hpp> to <opencv2/core/opengl.hpp>

The test cases are ported from gpu module (masked version is still
missing).
Key point direction definition is synchronized with cv::SURF.
nonfree module dependency is added into ocl module's cmake file.

Made all STL usages explicit to be able automatically find all usages of
particular class or function.

add a new function abssum
fix the bug of test and perf because someone remove non-free module from cmakelist.txt

change the download channels to oclchannles()
fix bugs of arithm functions
perf fix of bilateral
bug fix of split test case
add build_warps functions

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