2.2 Important bugfixes!

Fixes a dangerous bug (Issue #6) which was introduced with version 2.1. It allows for players to break locked containers with TNT, or locked shulker boxes with pistons or extract items with hoppers.

You can now place blocks on the sides of locked containers by sneaking. Like you normally can with unlocked containers.

Cleared up messages when entering lock/unlock/adminunlock modes.