SupSuper/OpenXcom — pull request #558 by cfailde (2013-07-19 20:57:27+00:00)
Title: Warn user of unknown command line options

Addresses the first part of #501 - OpenXcom not complaining about
unknown options.

Fix informs user on the command line.
example:
./openxcom -explodingSheep true
results in:
Unknown option: explodingsheep
Continue (y/N)?