Small bugfixes and command changes.

Fixed a small animation bug that made the player fly backwards while
using a medical item.

Added feedback messages to ban commands.

Moved all commands in main script to Commands.pwn and added a /rules
command.

Increased detection distance for MovementDetection.pwn, 25 seems to pop
up for non-hackers sometimes. 30 is now the distance.

Changed the Welcome Message / help dialog text slightly.