Pymap3d

For users without Numpy, PyMap3D can now fallback to a subset of functionality with Python alone.

Python versions tested: 2.6, 2.7, 3.3, 3.4, 3.5. 3.6, 3.7 (that's all that Travis-CI supports)

Better API compatibility with Matlab Mapping Toolbox.

HTML docs for Matlab and Python.

* Added several Matlab/Octave functions (save $1000 on Matlab Mapping Toolbox).
* cleaned up self-test

On [request](https://github.com/scivision/pymap3d/issues/3) Python 2.7 - 3.7 compatible.

Also added fallback simpler (but less accurate) functions where AstroPy not available.

PEP8, standardize setup.py

v.1.2.2