Added animation for item pickup and checkpoint interactions

I fixed some level blocking so navigation isn't quite so buggy (there is still some floating and clipping in spots).

New sound effects for attacking, getting hit, and dying for each race.  

Look out for future updates, I will be working on improvements to the combat system, more levels and quests, skill trees, more player abilities, boss fights, more advanced UI, more enemy types (archer, non humanoid), and much more soon.  

Let me know in the comments if there are any things you'd like added or changed!