Fixed module swapping from one slot to another slot in the same bank from causing a crash.  The behavior now is that the module is unfitted, then refitted to the new slot, and without the crash.
Added another to-be-supported option for eve-central_to_database.py python script used to update database invTypes base_price and market_orders entries.  Added new option to allow setting market_orders price data from eve-central.com based on each solar system.