Adding love to commands
Fixing bad imports
Merge branch 'work-on-command' of https://github.com/glava/akre into glava-work-on-command
Fix `toString` rendering of commands
Remove unused import
Merge branch 'glava-work-on-command'

Simplifies UntypedCommand so that it uses `ByteString`s instead of needing to
worry about different `CommandArgument` subtypes.