Make sure country being updated exists
Moved save country routine with direct database access into WPSC_Countries service class.  All the code that accesses the database for countries is together.
* Code from WPSC_Country class that was directly accessing database now part of this class.  All direct access to countries data is now in this service class.
* Removed superfluous code that was checking for, and forcing the, initialization of country data maps.
* Replaced missing code for tracking initializations in progress.  Not having the code was causing initialization recursion warning false alarms