* Adds a new IPhysicsShape object where you can define what collisions shape a PhysBody has.
AABB is now accessed through the PhysicsShape, so the BoundingBoxComponent is not required.
* Default PhysShape now copies the AABB of the BoundingBoxComponent.
* Fixed issue with serialization of PhysShapeAabbComp.
* Spatial queries now use ICollidableComponent instead of BoundingBoxComponent.
showbb now draws entities using the obsolete BoundingBoxComponent in Aqua.
* Renamed PhysShapeAabbComp to PhysShapeAabb.
Removed BoundingBoxComponent.
* Default CollidableComponent does not collide with anything now.
* Renamed ICollidable to IPhysBody.
Moved ICollidable to the Robust.Shared/Physics namespace.
* PhysShapes are now a collection of primitive shapes that contribute to the whole PhysBody.
ObjectSerializer.DataField can now deal with abstract types using YAML tags.
* Added LocalBounds property to ClickableComponent.
Added state to ClickableComponent.
* Added a Rectangle physics shape.
* ClickableComponent now actually checks that a click is inside its bounds.
* Reverted the addition of a try/catch around map loading. Any errors can propagate to the code trying to load the map again.
