Implemented basic command in IronRuby

- Moved a bunch of stuff around too
- Content folder has commands and game content
- New project (Core) for reflection loading; old project is called Game
- Added Ruby string array helper
- Commands are now a list of dynamic, because the Ruby type isn't the
same somehow.
- Figuring out which command to execute depends on reflection now
Ruby: don't add to list, just return it.
Added proper "Burn" command in Ruby

- Changed a bunch of stuff to dynamic so it can interop with IronRuby
- Moved InteractiveObject and player to core DLL