Compatibility fixes for wxWidgets 2.9
removed min/max macro's
Removal of popup for new resources found, which made browsing through old turns difficult.
Removed adding of no_ord_msg comment to unitorders when running monthlong_orders check.
Added more information to the 'check tax, trade for next turn' report.
Changed the SHOW_WARN macros to display the unit name with the error message.
Execution of pseudocomments now follows scoping rules of turn/endturn.