added username/password to etc.cfg
added authentication
changed youmongodbserver back to localhost
added try/except so it works also without username/passowrd
made etc.cfg more userfriendly
removed try/except, with no user/pass working fine, with user/pass working fine, with user/wrong-pass you find bad authentication in broker log
Merge pull request #4 from peterromfeldhk/master

added authentication