Add CMake build for opencv-ndarray-conversion

[shixudongleo]

The CMakeList.txt has been tested under ubuntu.
For Mac OSX, CMake will produce a examples.dylib fie instead of examples.so.

Any idea to improve so that it will work on both platform?

[yati-sagade]

Thanks for this. I tried out the build on my Fedora box and the OpenCV finder script seems to have some issues with my OpenCV installation directory. It might even be just my system with many versions of OpenCV here and there. Let me just be sure what it is before I merge.

Thanks :)

[shixudongleo]

Ok, thank you.
By the way, I have figured out why I can not compile using the same cmake file on mac osx. The main problem is that cmake does not work well with brew installed python. I have found the solution here:
Homebrew/legacy-homebrew#25118
In case you also want to use it under mac osx and meet with the same problem.