7.1.5 packaging bugfix

Hi @sitereactor I have discovered a bug in the code - it seams that "Documents" is root for documents and not "DocumentSet" but i am a litle insecure that always is the case so the fix handles both situations - do you know if this is the case? - if not I can change it so that "Documents" is always expected to be documents root
You are calling InstallDocuments with either Documents or DocumentSet as the root element. But I think you have to make a selection here or in the InstallDocuments - see other comment.