[updated] Documentation on PlayersNearYou packet.
[added] Who slashcommand, arguement parsing coming later, but can
retrieve information about players within range.

Change-Id: Id387e043866420ca62c175c692169e62c5963b2c
Merge "[updated] Documentation on PlayersNearYou packet. [added] Who slashcommand, arguement parsing coming later, but can retrieve information about players within range." into unstable