[overtime] Menus menus everywhere!

The Overtime series of posts will be for game changes that occurred after then end of the 7 DRL.   Since the 7drl judging is still ongoing, I won't be doing any intermediate downloadable releases from this point forward, so if you want to play the changes, you'll need to download the source and run from that.

Menus!  Yes, I've had a couple in place for a while, but this weekend has involved a focus on my complete menu system.  There's now a proper inventory menu , and I'll be expanding that out over the rest of the day to be fully functional. I also will be working with my artist to have some really fun menu backgrounds.  The whole menu system has been interesting to build.  It's also showing me a lot of weaknesses in my command-and-message passing solution.

To-Do list:

• More Menu work - Inventory Menu polish.  Equipment Menu setup.   Level-up Menu.   Elevator Controls menu
• Commands and Messages.   How the game passes commands between UI, Game, Maps, and Entities is very rough.   I'll be revisiting this, and possibly ripping out the entire solution to put in something a little more consistent.
• Levels and Difficulty.   Right now the player never improves except through equipment, and the monsters never get harder or more varied.  That needs to happen.
• Entities:
  • We need more monsters and Monsters need to vary as you travel through the hirise
  • Items and Equipment.  There isn't any, so I need to create some, and some rules for where they go and what monsters carry them.
  • Special effects.  Some things make neat effects happen, but none of that is implemented yet
  • AI.  All the AI are very basic.  There needs to be some significantly more in depth behavior added.