Redesign rules command

[vanstee]

Fixes similar to permissions by swapping long name options for subcommands and positional args.

USAGE

rules create <rule>
rules create <command> <permission>
rules list [-c <command>] [--command <command>]
rules drop <id>
rules drop [-c <command>] [--command <command>]

EXAMPLES

rules create when command is echo:echo must have echo:write
> Created rule "when command is echo:echo must have echo:write"

rules create "when command is echo:echo must have echo:write"
> Created rule "when command is echo:echo must have echo:write"

rules create echo:echo echo:write
> Created rule "when command is echo:echo must have echo:write"

rules list
> ID                                    RULE
  b3022f58-17af-11e6-840b-17a4fe636484  when command is echo:echo must have echo:write
  cc519e9e-17af-11e6-b7d4-33e4b58aa50d  when commnad is test:test must have test:test

rules list -c echo:echo
> ID                                    RULE
  b3022f58-17af-11e6-840b-17a4fe636484  when command is echo:echo must have echo:write

rules drop b3022f58-17af-11e6-840b-17a4fe636484
> Dropped rule "when command is echo:echo must have echo:write"

rules drop -c echo:echo
> Dropped rule "when command is echo:echo must have echo:write"
  Dropped rule "when command is echo:echo must have echo:read"