start removal of unused stuff

new option to reverse all the normals (for display). Man, the new code rocks :-)

- SVG export
- more work on new geo database

modified patch from philip kelleners (mostly for irix)

- fixed .msh save of negative volume 2nd order hexas

fix info msg

need to add new vertices into Surface->Vertices (for possible later extrusions)

link with GmshPlugin before GmshCommon (for dave)

add option to renumber the nodes in .msh files (to avoid gaps in the sequence)