[WIP] Automatic Identification System (AIS) transponder equipment

# Forewarned:
I've posted on the forums about my ideas for an [Automatic Identification System](http://pioneerspacesim.net/forum/viewtopic.php?f=3&t=262) so if you want to discuss gameplay implications please do so over there!

Technical and code issues are for here.

# What does this change?:
There are many changes so here is a summary:
* bump the save game,
* add new strings to be translated,
* new LuaShip functions,
* new equipment,
* new equipment _slot_,
* affects things displayed in SystemView and what is displayed in WorldView.

# What still needs to be done:
Right now this could probably be added but it doesn't do much because there's no way to change the state of the AIS transponder or to purchase an improved one from the black market.

Andy