Implemented command to remove prisons.

Added new HashMap wrapper to represent set of prisons.
I. Am. Confused. Command removing.
Add list command, and remove dist folder.

Also, refer to plugin folder dynamically.
Whoops. Add Listing CommandExecutor.
Complete list command.

Fix path bug in Warden.
List command:
> Validate arguments.
> Change output colour depending on world environment.
Minor output format changes.
Fixes to imprisoning.

Deal with differences in worlds.
Only send message when actually imprisoned.
Fixed conflict with EssentialSpawn.

Also, removed unused imports.
Comment out debugging imports.
Moved command executors to their own folder.
Update version to 0.3.

Also, add Apache Commons notice.
Add Apache Commons notice

Which I forgot to add in the last commit...
Merge branch 'master' of github.com:lmcmenemie/Prison