Bugfixes + HUD UPDATE

Fixed some massive issues in the Tile class that were preventing
non-object display and causing multiple tiles to display simultaneously,
and integrated a BRAND NEW HEADS UP DISPLAY!!!! The HUD functionality is
currently linked into the player leveling system. Kill a pot, get XP, XP
bar increases. Cool stuff, and it looks really nice.
Merge branch 'master' of https://github.com/jackhamilton/ProjectVenatus