Merge remote-tracking branch 'justin/master'
Added Turret Class that extends Structures and implements canAttack
Added Structures Class which implements Attackable
Merge remote-tracking branch 'Dan/master'
Added Javadocs
Merge remote-tracking branch 'Sam/master'
Merge remote-tracking branch 'Austin/master'
Merged Team Changes
Merged changes created by team. Also corrected a few identifier issues
with Structures and Turrent classes. Also started Interactable class
Changed Structures to Stucture
Merge remote-tracking branch 'dan/master'