Bugfixes and Help Screen

Just released a new version, adding a help screen and a few more bugfixes.  This will probably be the last version that still counts as the 7-day version, as I'll be adding new features soonish, but I'll make sure to post a version of the executable specifically marked as the 7-day version before putting up anything that has new stuff in it.

• Added help screen with list of commands ('?')
• Bugfixes:
  • Fixed doors being transparent until the first door is opened on a level.
  • Allowed spaces in spell names
  • Allowed Home, End, PgUp, PgDn movement keys
  • Corrected 'y' and 'u' movement to NorthWest and NorthEast, respectively
  • Fixed a rare crash on player death which was preventing a game restart
  • Made it harder for players to accidentally close the quit and restart prompts.