New functions in World

Used the Level.dat file as a reference for function that might be useful
for the API
Fix spelling error in getDifficulty()
Fix merge issues, thanks @Nickforall
Merge branch 'Nickforall-World.java'
Merge branch 'master' of github.com:TridentSDK/TridentSDK
Add JavaDoc information for SchedulerType

Who are you, and what do you do?