Undid the damage caused by #981. Apparently, AttemptExtensionOfGroup_proposed isn't working, but the rest of the changes of that checkin are fine.
Undid the damage caused by #981. Apparently, AttemptExtensionOfGroup_proposed isn't working, but the rest of the changes of that checkin are fine.

git-svn-id: f69fc61b9d796d9b03e260ba63c235c771c4d74f@990 19b06628-3642-0410-8fdd-33ae7300e995

amahabal/Seqsee,amahabal/Seqsee