LAYOUT-GRAPH-NODES     We use PARSE-SPACE now to grok physical units.     Q: Is this the correct place to do it?
LAYOUT-GRAPH-NODES
    We use PARSE-SPACE now to grok physical units.
    Q: Is this the correct place to do it?

FORMAT-GRAPH-FROM-ROOTS
    - Added &allow-other-keys to the signature
    - Options are now passed onto the graph-output-record class.

LAYOUT-GRAPH-EDGES
    Calls arc-drawer correctly

STANDARD-ARC-DRAWER, ARROW-ARC-DRAWER
    New functions

swflint/McCLIM,slyrus/mcclim,onixie/mcclim,onixie/mcclim,swflint/McCLIM,antifuchs/mcclim,swflint/McCLIM,onixie/mcclim,slyrus/mcclim,antifuchs/mcclim