bug #5308 : Some HTML entities in some texts are encoded again for HTML

 Unescape all HTML entities in the publications and in the comments updated since 2013-10-07 (the release of 5.12.4).

Don't forget to integrate also the branch bug-5308 in Silverpeas-Core and in Silverpeas-Components.

The integration should be done also for 5.12.8-SNAPSHOT.