Continuing to debug

Continuing to debug the odd rings
Removed old debug statement
Added zorder, debugged some problems with physicsshape, bg is now an entity

switch zorder to renderclass
Changed zorder to RenderManager, haven't deleted zorder yet

Changed PhysicsClass to EntityClass and Id, so there are a lot of
changes.
Deleted zorder
Ring Bug fixed, forgot to set the initial time for bullets and entities to creation time.