Update Avis.java. Increases Randomness

A quick random number generator helps to make the motion of the chickens/bats more... random
Fixing avis errors
Allowing Expelliarmus to get living entities as well
Updated AvadaKedavra to use the new targetting system
Updated Spell targeter to allow for multiple particle effects
Added Bauleo spell
Fixed weird character issue... not sure why the build wasnt failing because of it.
Merge pull request #2 from zachoooo/master

Updates to Avis, Expelliarmus, AvadaKedavra, and Spell Targeter