Add time management system/rudimentary bump-to-attack combat

[ceruleanskis]

Want to be able to have creatures other than player on the map. Creatures should take turns in a queue system.

[x] Add monsters and blocking behavior for monsters 533228b
[x] Add simple monster AI (random movement) cfda7b9
[x] Add queue based time management system cfda7b9
[ ] Save and load monsters
[ ] Add rudimentary combat (bump to attack, can just output log for now)