on feature #5515, improving portlet to display news progressively
on feature #5515, some improvements :
- removing drafts that have never been saved by contributor
- checking title length
- fixing label of parameters relative to thumbnail

Conflicts:
	quickinfo/quickinfo-war/src/main/java/com/stratelia/webactiv/quickinfo/control/QuickInfoSessionController.java
fixing bug #6083 : using right conversion method
Fixing a wrong behavior on the news creation.
Using new volatile cache of resources services.

Conflicts:
	quickinfo/quickinfo-jar/src/main/java/org/silverpeas/components/quickinfo/model/DefaultQuickInfoService.java
	quickinfo/quickinfo-jar/src/main/java/org/silverpeas/components/quickinfo/model/News.java
	quickinfo/quickinfo-war/src/main/java/com/stratelia/webactiv/quickinfo/control/QuickInfoSessionController.java
Fixing a bad formatting of CSV export of YellowPages application.
Fixing some compilation problems after merging from 5.15.x