* separates Rays from CollisionRays, removing collision masking from Ray
* Entity, ClientEntityManager and EntityManager classes occasionally need to UpdateEntityTree
Entity intersection queries now use a DynamicTree
DynamicTree now correctly reports Count and separately NodeCount
DynamicTree now has optionally precise queries
DynamicTree no longer incorrectly Adds on AddOrUpdate if Update is not necessary
Entity startup now starts Transform, then Collidable, then remaining components
EntityManger's Entity dictionary is now a ConcurrentDictionary to support iteration under modification
DynamicTree freeing root leaf no longer results in invalid tree
SnapGridComponent has been extended to support additional area and directional queries
* added lots of calls to UpdateEntityTree, will need to scale back during review
fixed moved/changed AABB updates to DynamicTree, missed a ref
converted other methods in EntityManager to use the tree for spatial queries
* add unit tests for DynamicTree
make Capacity and EnsureCapacity public, setting Capacity will call EnsureCapacity
* fix brace style
* Box2 Grow -> Enlarged, Combine -> Union
Pieter-Jan Briers