VS11 desktop Excel acceptance

1. Run BUILD_SUITE.cmd, unload the previous suite XLAM, load VS11.
2. Open Product Mix. Run EvoOpt and choose No. Check result 2000 at 20/40;
   Model C8:C9 must still contain the starting values 10/10.
3. Run again, choose Yes; C8:C9 should become 20/40 and C14 should be 2000.
4. Choose Restore Inputs; C8:C9 should return to 10/10.
5. Open Formulation separately. Run and compare against .3/.2/.5, cost 14/kg.
   Search output may differ slightly within the configured tolerance.
6. Test Stop Search and Ctrl+Break separately. Verify starting inputs and Excel
   calculation/event/status-bar settings recover after stopping or interruption.
7. In a disposable copy of Product Mix, change constraint row 5 to >= 500.
   No feasible grid candidate exists. Check that no apply prompt appears, and
   that the report identifies infeasibility rather than claiming an optimum.
8. Keep the original example copies for comparison.
