Bug squashing and implementations

Whoops - I meant to upload this awhile ago, but got carried away. Many
changes, including:
- The addition of the positions module, which fixed /setspawn
- F2 door/vehicle owning not working properly
- Voice chat has been fixed
- /votecp (or vote anything really) has been fixed
- The arrest stick has been fixed
- Rocks no longer spawn half way in the ground (in case there is a room
below the ground)
- I've begun implementing a paramedics system. The player will not be
able to respawn if the die, so please disable the ldrp_health module.