Pass the Render_to_finite_elements_data around more so that it is easier to add and remove parameters.  Add a persistent node_offset and an element_offset so that we don't keep seacrhing for a free index from 1 every time.
Pass the Render_to_finite_elements_data around more so that it is easier to
add and remove parameters.  Add a persistent node_offset and an element_offset so that we
don't keep seacrhing for a free index from 1 every time.


cmiss/cmgui,cmiss/cmgui