redraw the bounding box after changing the limit
 do a proper initialization of a model, that was not loaded from a file (e.g. TestModel)
 fix the height calculation of the drill
 fix the order of triangle points when creating the ODE shape


git-svn-id: https://pycam.svn.sourceforge.net/svnroot/pycam/trunk@128 bbaffbd6-741e-11dd-a85d-61de82d9cad9