Finally got around to finishing this: GM command @setmusic

This allows its user to change the currently played music on their client - not the server itself.

Renamed CChocoboMusicPacket to CChangeMusicPacket, deleted chocobo_music packet and replaced with new change_music packet, gave lua binding and made sure chocobo triggers correct music track.

Also included is an update to addallmaps that adds the newer map KIs.