EVO timetracking: Backlog dialogBox check: Task not resolved, backlog cannot be '0'

+ FIX validationTips
HolidaysReport: display 'leave' task summary
i18n
DOC FR bonnes pratiques (draft)
INSTALL ExternalTask: Sick Leave
FIX SESSION session name must be unique
FIX CreateTeam: only administrators can create teams

this is a security fix: anyone could create a team
and add any users and spy their activity and tasks.
WORKAROUND Commands: CmdName cannot contain commas

DetailedChargesIndictor error:
[Thu Jun 13 23:02:53 2013] [error] [client ::1] PHP Fatal error:  Call to a member function getDrift() on a non-object in /opt/codev/indicator_plugins/DetailedChargesIndicator.class.php on line 214, referer: http://localhost/codev/management/command_info.php
[Thu Jun 13 23:02:53 2013] [error] [client ::1] PHP Stack trace:, referer: http://localhost/codev/management/command_info.php
[Thu Jun 13 23:02:53 2013] [error] [client ::1] PHP   1. {main}() /opt/codev/management/command_info.php:0, referer: http://localhost/codev/management/command_info.php
[Thu Jun 13 23:02:53 2013] [error] [client ::1] PHP   2. Controller->execute() /opt/codev/management/command_info.php:192, referer: http://localhost/codev/management/command_info.php
[Thu Jun 13 23:02:53 2013] [error] [client ::1] PHP   3. CommandInfoController->display() /opt/codev/classes/controller.class.php:76, referer: http://localhost/codev/management/command_info.php
[Thu Jun 13 23:02:53 2013] [error] [client ::1] PHP   4. CommandTools::displayCommand() /opt/codev/management/command_info.php:86, referer: http://localhost/codev/management/command_info.php
[Thu Jun 13 23:02:53 2013] [error] [client ::1] PHP   5. CommandTools::getDetailedCharges() /opt/codev/management/command_tools.php:507, referer: http://localhost/codev/management/command_info.php
[Thu Jun 13 23:02:53 2013] [error] [client ::1] PHP   6. DetailedChargesIndicator->getSmartyObject() /opt/codev/management/command_tools.php:307, referer: http://localhost/codev/management/command_info.php
[Thu Jun 13 23:02:53 2013] [error] [client ::1] PHP   7. DetailedChargesIndicator->getOverview() /opt/codev/indicator_plugins/DetailedChargesIndicator.class.php:186, referer: http://localhost/codev/management/command_info.php
i18n : add empty de_DE template file
FIX issueInfo: do not display issue if not granted