USGS Spectral Library Version 7 documentation

[bdegley4789]

Add documentation for pycoal users to use the convolved envi files for USGS Spectral Library Version 7

[bdegley4789]

@lewismc I'm having trouble finding the code to edit to include information on the conversion classes I created in mineral.py to get them into readthedocs https://pycoal.readthedocs.io/en/latest/mineral.html

[lewismc]

Here you go https://github.com/capstone-coal/pycoal/blob/master/docs/source/mineral.rst You can build the documents locally so you can try it out before submitting a PR

[bdegley4789]

I tried doing the same thing that was done for the AsterConversion class https://github.com/bdegley4789/pycoal/blob/master/docs/source/mineral.rst I'm not sure why it says module 'pycoal.mineral' has no attribute 'SpectalToAsterFileFormat'

/Users/bryceegley/Desktop/pycoal/docs/source/mineral.rst:30: WARNING: autodoc: failed to import class 'SpectalToAsterFileFormat' from module 'pycoal.mineral'; the following exception was raised:
Traceback (most recent call last):
  File "/Users/bryceegley/anaconda3/lib/python3.6/site-packages/sphinx/util/inspect.py", line 169, in safe_getattr
    return getattr(obj, name, *defargs)
AttributeError: module 'pycoal.mineral' has no attribute 'SpectalToAsterFileFormat'

[lewismc]

push what you have I will look at it tomorrow, thanks go to bed.

[bdegley4789]

ok will do. I pushed it to my fork https://github.com/bdegley4789/pycoal/blob/master/docs/source/mineral.rst