Increased the threshold for justifying a threaded Octree raycast. Exposed PhysicsWorld::Raycast() to Lua.
Added a warning when an UnknownComponent is created.
Fixed mismatching scene savefile names in Lua examples.
In XML mode, allow editing of UnknownComponent attributes as strings. This is as far editing them can go without adding extra data to the whole XML serialization. Closes #149.
Removed unnecessary include.
Added external projects/links documentation page.