Working towards WG release (Alpha 2) #12 #7

These changes need testing!!!!  Database was expanded slightly.

Made MuniWGRegion class to load info from the database.
Added expansions integer to Town class to track the total number of
expansions made to the town border.
Added transaction logging to payments from town bank to allow expansions
and subregion creation to be logged.
Added static costs to making subregions and checks to ensure the number
of regions stays below the values defined in the config (the values were
added last commit).
Added confirmation to deletion of town; also added town border region
removal.  This is missing the delete all border.
Added DB support for town bank transactions.  Need to add a command to
reference these.