Invite already existing kune users to lists and groups functionallity.
fixes #2

Merge remote-tracking branch 'swartz/master' into inviteKuneUsers
Invite existing users to groups and lists

closes #2

Merge branch 'master' of swartz:kune into inviteKuneUsers
Invite existing users to Groups and Lists. #2
Merge remote-tracking branch 'swartz/master' into inviteKuneUsers