WebComment: comment submission deadline (CERN)

* Displays the comment submission deadlinem, when present.
  (CERN-specific)

Co-Authored-By: Nikolaos Kasioumis <nikolaos.kasioumis@cern.ch>
Is this displaying dates like '05/06/2014'?  This format is ambiguous and better [be avoided](http://www.w3.org/QA/Tips/iso-date).  What about using ISO like formatting (YYYY-MM-DD) or even better own own `dateutils` library that can print dates in internationally understandable formats?  (see datetext vs dategui)