FXOLAT-437:  don't delete efficiency statements of existent course, delete all UserCourseInfos before deleting the repository entry

OO-167 changed archive file ending from .xls to .csv becaus that is what it actually is, escaping doublequotes with doublequotes...

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branch : i18n_OO

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branch : i18n_OO

OO-204: refactor the DisplayPortraitManager to allow portrait saved in PNG and using the new ImageHelper implementation

OO-203: refactor the ImageHelper to use different implementation, add an implementation based on ImageMagick/GhostScript for pictures and PDFs thumbnailing

FXOLAT-426 : remove LDAPAdminExtension class, add genericActionExtension (for SysAdminController) in ldapContext.xml. (according to the other modules)

FXOLAT-357: implements link abonnement to assessment tool, upgrade the publisher with the right business path

OO-183: if there is nothing to translate, don't show the translation panel. I don't see a better way to handle the issue for the moment.