This directory is for media which is needed but not required by each client.
Required media needs to be kept in the repository of the client.

Media MUST match the following criteria,
 * Be in format required by clients, normally PNG or Ogre Meshs (working media should be stored elsewhere)
 * Compressed, all PNG must be stored at maximum compression, all Ogre Meshs should be stored in compressed format

Media is sorted into
 * common        - Used by all clients
 * common-2d     - Used by all 2d clients
 * common-3d     - Used by all 3d clients
 * <client name> - Used by a specific client