MULE-41: Added backend for random events.
MULE-41: instantiated random value in random event simulator.
Merge pull request #7 from msnorth/041f__random_events

041f  random events
Added MULE placement feature to sprite code.
Sprite now enters town and does not go directly into pub or store.
MULE changes
change
Mule buying works properly in store. Button selection works properly
now. Status Bar was updated to reflect mule changes. Removed MULE from
resource amount since it is not a resource.
Improved functionality of store and added proper comments. Changed
methodology for setting prices for the mules.
Merge remote-tracking branch 'origin/042f__M8_Sprite_With_MULE'
Latest changes to the store menu and game functionality.
Fixed tile selection, tile checking if it has a mule, and store refresh
Mule Deployment latest
Indication of mule deployment exists in UI
Cleaner
Even cleaner.
Even even cleaner.
Squeeky clean
Image handling for tiles now in TileImageLoader and TileImageFactory
TileImageFactory cleaned