Nlmpy

In this release a a binary space partitioning (BSP) NLM function has been added to NLMpy.

This is also the first version to be released with an associated archive in Zenodo.

Refinement of some terminology for the Perlin noise function. No functionality has changed, and users of 1.0.0 who didn't specify the old "valley" parameter will see no change at all as the default functionality is identical, it is only those folks who specified the "valley" parameter will need to update their code to match the new parameter terminology.

This is a major milestone for the `NLMpy` project, so is worthy of a realease at version 1.0.0.

Major changes/updates include:
- putting the code onto GitHub
- adding new NLM functions: `waveSurface` and `perlinNoise`
- integrating with numba to speed processing times

There have also been some minor changes including:
- `blendArray` function replaced by a simpler more intuitive `blendArrays` function