This is a hack of Parser.h and parserm.h from the Inform 6/10 library to support
timed input. It won't do to create Freefall or anything - it's intended for 
Border Zone style games.  Also included is a brief demo program.

To use this hack, simply include "Parser_rt.h" instead of the standard 
"Parser.h".  This will probably not work under a version other than 6/10.  

See the comment block at the top of parserm.h for further instructions.