* this allows a better handling of the support grid (especially for the ContourFollow strategy)
fixed an old bug regarding the "get_free_path_triangles" function: it returned a free path even if the start and end points were completely within the model


git-svn-id: https://pycam.svn.sourceforge.net/svnroot/pycam/trunk@770 bbaffbd6-741e-11dd-a85d-61de82d9cad9