Updated StockRoom hibernate mapping to include location.
Renamed Transfer to Transaction.
Completed initial design of stock room transactions and associated item lists.
	- Created ImportBatch class to track the import of items from an outside system.  This is where the item expiration, if any, is set.
	- Created the StockRoomItem and StockRoomTransactionItem classes to track items in associated area.
	- Updated liquibase script to include new table and relationships.
Added Item.HasExpiration property and associated liquibase script and hibernate mapping.