Fix ordering on workers lists
Fix ordering on workers lists

Emebr does not allow to use mixin on create, it needs to be passed to
extend().

(closes #151)

travis-ci/travis-web,jlrigau/travis-web,jlrigau/travis-web,jlrigau/travis-web,fotinakis/travis-web,mjlambert/travis-web,mjlambert/travis-web,jlrigau/travis-web,Tiger66639/travis-web,fotinakis/travis-web,travis-ci/travis-web,fauxton/travis-web,mjlambert/travis-web,2947721120/travis-web,Tiger66639/travis-web,2947721120/travis-web,Tiger66639/travis-web,fotinakis/travis-web,travis-ci/travis-web,2947721120/travis-web,travis-ci/travis-web,Tiger66639/travis-web,2947721120/travis-web,fauxton/travis-web,mjlambert/travis-web,fauxton/travis-web,fotinakis/travis-web,fauxton/travis-web