Applying patch from issue 83, more additions (and a code cleanup) to GroupManager
Applying patch from issue 83, more additions (and a code cleanup) to GroupManager

git-svn-id: c32cf1ecefca26b8770d7b0740bc0c5c174087e4@1106 c754d5e9-d413-0410-bcdf-9574c9dba6b7

jhs/libopenmetaverse,jhs/libopenmetaverse,jhs/libopenmetaverse,jhs/libopenmetaverse