Removed a boost header include.
Styling changes to all the headers in the physics system.
Obliterated the BulletFile and BulletFileManager classes.
Cleaned up a few warnings.
Changed the "PhysicsConstructionInfo" to the "ManagerConstructionInfo" and move it to it's own file.  Updated the rest of the API as needed.
Fixed more warnings in Catch.
Fixed some identation oddity.
Fixed more warnings.
Added the namespace/folder name to the include guard.
Updates to the physics system to enable multi-threaded simulation steps.  There are still a number of bugs with this though.  2 to be specific.
Updates to API changes.
Added the bit of configuration that enables multi-threaded physics.
Merge branch 'master' of https://github.com/BlackToppStudios/Mezzanine
Final updates to the Simulation work unit.  Also some styling changes to some code in the entresol as well as code surrounding the "RenderWorkUnit" for the graphics manager.