(*Dungeon).Tile(int, int) Tile -> (*Dungeon).Tile(Vec) Tile
Display game messages only if they were from a visible source
Rename Vec to Vector
Vector methods, improve Mob AI - will now pick up things, not kill self
Mobs drop inventory on death
Disable parallel processing
mob vision++, fix quit handling regression, add Vector tests
Test AbsInt
go fmt
Minor golint suggested tweaks
(Vector).mul(int) Vector
Rectangle sanity
Create and use a single source of randomness
Random room based dungeon