v0.9.1-beta.5

• World space text plane to show parameters. Manipulate it with keypad / * - +. (Disappears when the UI is hidden)
• Test command mesh2con: moves the mesh to the motion controller. Highly experimental. The existing parameters, which are fit for the fixed-camera environment, would act weird.
• Also the keypad enter moves the overlay level UI to the world space, which is not useful since the controller cannot click the buttons. Thus this is to be removed in the next build.