In progress:
*	Why doesn't input.config filtering via headers "Configs" work?

To do:
*	change init threads (should catch own exceptions)
*	finish event callback support
*	add remaining SDL event support
*	add options support; in particular for whether or not to use threads (and adjust Init to use this).
*	OutOfMemoryException is not currently checked for − it should be at least in critical places (use high-level catching of all errors?).