Implemented AABBTree::CollisionCheck
Implemented AABBTree::CollisionCheck

CollisionCheck() will check if a sphere of a given radius intersects
with a node in the AABBTree.

A helper method AABBSphereTest has been added to make the actual check.

Reduced the AABB halfsize back to 2.5 as our AABB's are 5 units to match
the current room size.

adam4813/Sigma,adam4813/Sigma