Added my worlds and changed things listed below

Player script changed: Now detects tags for obstacles or exits(Next
levels), then will load the level/next level according to the current
level(be sure to add to the build list!)
Prefabs: Added several prefabs
Worlds: Added two new worlds with bosses and obstacles(90% complete),
Please don't add any of your shit to my worlds without asking. I have an
art direction for each and plan to keep it that way. (Upgrading scripts
are always welcome, but don't break them)