continuous-integration/drone/pr Build is passingDetails
continuous-integration/drone/push Build is passingDetails
This cleans up the command parser a lot, as all of the one or two line
functions and associated imports have been removed. Unfortunately it
does make the command files larger, as two trait impls are required:
one for converting to Box<dyn Command>, and one for converting from
&str to the command type.
Fixes#66.