Investigate adding cwipc to the Unity Marketplace

[jackjansen]

After #30 we should see if we can include cwipc in the Unity Marketplace (or whatever it is called).

For this we should probably include binary DLLs for everything except the Kinect and Realsense SDKs, at least for Windows. (and provide decent instructions for how to install those two).

I think that for Mac/Linux it is best if we don't include any .so or .dylib but simply provide instructions (brew/apt). Especially for Mac, because Unity doesn't really like having multiple dylibs with the same name, even if they are for different platforms.