#644 - Fixed up broken build
648 - Reset previews object after a link has been updated
Merge pull request #648 from simong/648-link-update-trigger-previews

Changing link target doesn't generate a new preview
Merge branch '644-cleaner-log' of git://github.com/simong/Hilary into 644-cleaner-log
Merge branch 'master' into userManagement