Added link to the change log.
Bug fix in group synchronizer.

Member has been validated before adding into the group. New behaviour is to add member to the group and then try to validate him.
Merge pull request #209 from tauceti2/synchronizerFix

Bug fix in group synchronizer. Members was created and validated and then they got access to group which may require some additional attributes, therefore member should not be validated in a first place.
Merge remote branch 'origin/master'