Physics Shapes (#306)

* Removed BoundingBoxComponent.

* Updated prototypes to use refactored CollidableComponent.

* Renamed ICollidable to IPhysBody.
Moved ICollidable to the Shared/Physics namespace.

* Migrated more yaml files to use PhysShapes.

* Updated YAML to use the new list-of-bodies system.

* Updated the new prototypes.

* Update submodule

* Update submodule again, whoops

Content.Shared/Physics/CollisionGroup.cs

@@ -1,17 +1,23 @@
 using System;
+using JetBrains.Annotations;
 
 namespace Content.Shared.Physics
 {
     /// <summary>
     ///     Defined collision groups for the physics system.
     /// </summary>
-    [Flags]
+    [Flags, PublicAPI]
     public enum CollisionGroup
     {
-        None = 0,
-        Grid = 1, // Walls
-        Mob = 2, // Mobs, like the player or NPCs
-        Fixture = 4, // wall fixtures, like APC or posters
-        Items = 8 // Items on the ground
+		None      = 0,
+		Grid      = 1 <<  0, // Walls
+		Mob       = 1 <<  1, // Mobs, like the player or NPCs
+		Fixture   = 1 <<  2, // wall fixtures, like APC or posters
+		Items     = 1 <<  3, // Items on the ground
+		Furniture = 1 <<  4, // Tables, machines
+
+        // 32 possible groups
+        MobMask = Grid | Mob | Furniture,
+        AllMask = -1,
     }
 }