uValid for ATM4 NASA LIDAR

I spent a bit of time on this one, and it is not that different than the C++ code I wrote before, really.  This version is mostly python, and does not have the plug-in interface that cvalid had that I had hoped would get other scientists into finding new things to do with our data, with applying new processing algorithms.  Sometimes management is short-sighted, I guess.

The thing is – the data format is completely different in the most modern ATM format (which is what uValid processes), so it must be handled differently than the older “cvalid”.  Only uValid can handle this format.

So: uValid is a different animal, and I am happy to publish this.

It uses “cython” to speed things up in the computation intensive areas, and believe me – it’s necessary.  Python is kinda slow relatively speaking, so using cython help certainly helps speed up processing.