remove unused
select not only dates, but also times to not to fail on end-of-day borders (e.g. feb 10, 11:30 pm to feb 11, 0:30 pm, see: http://jenkins.plone.org/job/plone-5.0-python-2.7/3063/testReport/junit/plone.app.event.tests.test_robot/RobotTestCase/Scenario_Create_and_view_an_event/ )
Added Czech translation
new icalendar version
Revert due to test failures: "pass the context to ``getUtility`` in ``default_timezone`` function"

This reverts commit 86375de458f8645a46fa70e16a3a5177253ce9ab.
skip whole robot test due to test irregular test failures
really deactivate robot_test
Monat = maskulin
Portlet calendar update
event list summary dt dd to ul li and clear classes