email out release announcement

[embeepea]

Once 4.0 is released, send email announcement to:

Semmy
multigraph-users@sourceforge.net email list
John Keck
Rich Baldwin
Jon Burroughs
Ann Clites / Drew ?? @ GLERL
Jeb Stewart @ ESRL
Davide Cervone
David Herring / Dashboard Team
all@nemac.org
devin eldreth