display special characters from the post content (e.g. éàè,...)  with <sp:truncateHtml  taglib

added decodeHtml() first before processing de replaceAll. This is in
order to manage e.g. french accent in html  i.e. é == &eacute;  

DataBase ==> <p>Suivi des productions &eacute;closeries sur la campagne
2014/2015</p>
decodeHtml() ==> <p>Suivi des productions écloseries sur la campagne
2014/2015</p>
replaceAll ==> Suivi des productions écloseries sur la campagne
2014/2015