OO-217: pass the geometry with '>' and enhance the analyse of the output to find the size of the image if it's not scaled

OO-208: offer to download only the attached file and not a generic Mapper (there is only one file to download)

OO-154 : two new subclasses of DatePropertyHandler. (futureDate* and pastDate*).  replace DatePropertyHandler for userPopertyBirthday with PastDatePropertyHandler ( in userPropertiesHandlersContext.xml ). two new i18nkeys for error-message added (in en and de)

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branch : i18n_OO

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

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)