Fix Linux error, misc linting

Laura A DeCiccorequested to merge
github/fork/jsta/master into master

Created by: jsta

This PR fixes the Linux specific error described in #27 (closed). More details on my journey (which included a crash course in Fortran 77) are at https://stackoverflow.com/q/45270145/3362993.

This PR also includes some miscellaneous linting that I did along the way.

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