Add support for createCLAHE()

I need to so some luminosity leveling and there are a number of ways, but it seems like the ideal for me is [createCLAHE](https://docs.opencv.org/3.0-beta/modules/cudaimgproc/doc/histogram.html#cuda-createclahe) and I'd like to try the following with it, but I see no sign of it in the project and don't understand the bindings well enough to get it working (including a working build). I'd really appreciate having this and if anyone can suggest another approach.

My next idea is to Convert to Lab, set a/b to 128, then convert to GRAYSCALE and use equalizeHist, but that's more instinct that a solid idea yet :)