Feature #3178 - upgrading forum subscriptions
- adding the possibility to subscribe to a resource represented by a Silverpeas primary key
- upgrading Silverpeas Notifier JQuery Plugin to handle messages on the loading end of a WEB page
- refactoring some code
Merge branch 'master' into feature-3178
Feature #3178 : upgrading forum subscriptions
- adding new method into WysiwygController to handle indexation
Merge branch 'master' into feature-3178

Conflicts:
	lib-core/src/main/java/org/silverpeas/wysiwyg/control/WysiwygController.java
Feature #3178 : fixing a little problem on wysiwyg controller and index management
Feature #4658 : adding more informations to the directory search result
- adding StringUtil functions to JSTL libraries (silfn)
Merge branch 'master' into feature-3178
fixing bug #4738
using StringUtils.splitByWholeSeparator instead of StringUtils.split !
adding several traces to simplifying debug
fixing bug #4725 GED : Notification d'abonnement à un axe de PDC sur des publications en mode Brouillon
Feature #3178 - upgrading forum subscriptions
- displaying dynamic notifications in this order : error, success, info
- adding new taglibs to handle dynamic notification displaying. (useful file.tag technic has been used)
- adding a jstl function to perform string capitalization
Merge branch 'feature-3178' of https://github.com/SilverYoCha/Silverpeas-Core into feature-3178
Bug #4727 : adding the possibility to define default date or/and hour for the date checker plug-in.
fixing bug #4758 : transform ImportReportManager class into a singleton
refactor the work of Cecile in order to keep the ImportReportManager thread-safe

Resolved Conflicts:
	web-core/src/main/java/com/silverpeas/importExport/control/GEDImportExport.java
fixing bug #4601 GED Ajout de fichier manuellement: le paramétrage de limite de taille n'est pas pris en compte
fixing bug #4601 GED Ajout de fichier manuellement: le paramétrage de limite de taille n'est pas pris en compte
Bug #4601 : factorizing some code and fixing a little problem on Silverpeas date checker plug-in about the use of a default date hour.
Closing progress message instead of reloading page on error of upload file size limit.
Harmonizing some code.
fixing bug #4772
using cloned object in each step of recursion
In the web site documentation, set the stable version of Silverpeas at 5.12.2 and add the missed release note of the 5.12 release
closing feature #4568