Fixed all typos I can find
PEP-8 and PEP-257: ''' to """
Revert "PEP-8 and PEP-257: ''' to """"

This reverts commit c192809517ab41914716ea1f8ad7e31a3511dccf.

For consistency with sister projects.
Merge pull request #124 from wari/Spelling-Fixes

Spelling fixes and PEP-8/PEP-257 changes