Added Trackable to #showstats
Invisible/hidden NPCs will no longer show on track.

Removed track packet creation since our client does not require it.

"trackable" column in npc_types if set to false will now make the NPC invisible and will not show on track. I have not figured out a way to make a visible NPC untrackable. I am not sure if it is possible.

Removed some destructible object code and the track rules since they don't actually do anything.
Merge branch 'master' of https://github.com/cavedude00/Server