Merge pull request #1 from jasontclark/master

Code linting; responsiveness to Python environment

+ housekeeping edits & commenting
Extended code documentation (unbuilt)

Whitespace fixes, added code explanation details
Tab width correction
Merge branch 'master' of https://github.com/jasontclark/wthr.py into jasontclark-master

Conflicts:
	wthr.py
Merges pull request #2 from jasontclark/master

Environment now Python3, forcast option
Fallback to python2 environment default