MNT: prepended 'opts' to the valid options for info_type

TST: Updated tests to match changes

ENH: .converage added to .gitignore

ENH: remove duplicates in gitignore and fixed coveragerc

DOC: lists of valid options added to docstring

TST: Finished comparison testing of elements

mostly doc: edits re: caswell

MNT: Renamed dict keys to match rename of inputs