GITFNS quote branch names in git commands (#1693)

* GITFNS gets prc information in JSON form

prc uses the simple JSON parser in the new lispusers file JSON to convert the json string into a lisp data structure.  Maybe the commonlisp package YASON that Matt looked at would be more general, but perhaps also requires more understanding.

With this change, drafts should be marked with D, approves should be marked with A.

* Quote branch names in git commands -- attempt to fix issue #1691

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Co-authored-by: rmkaplan <ron.kaplan@post.harvard.edu>

Author: MattHeffron