Changed the XML initializer file so lame XML parsers such as firefox don't freak out when read.
Created a scaling shape to allow us to have proxy specific scaling of collision shapes.
Added methods to add and remove a proxy to the world to the WorldProxy Interface.  Also updated the audio proxies to implmenet these methods.
Finished the scaling code in the PhysicsProxy class.  Although it is still not a complete solution.
Added documentation to reflect the limitations of specific collision shapes.
Some code styling touchups and added basic members for world objects being owned by worlds.
Changed the styling for the methods fetching internal pointers to more closely match the style of internal methods elsewhere in the engine.
Added more enums for settings on the physics proxy.  Also changed the name of the Activate State enum so it no longer states WorldObjects.
Removed the public deserializer.
Implemented more accessors to the physics proxy.  Aside from really internal stuff the wrapper is pretty much feature complete.  Just need to finish serialization.
Some small touchups to the RigidProxy class.
Merge branch 'master' of https://github.com/BlackToppStudios/Mezzanine