fixes a defect which shows up in the new internet explorer 11
related to #42
fixes image type selection and removes animation for image types.
fixes #42
new tile view for events
Improved tiles handling
Merge branch 'master' into v3.1.0

Conflicts:
	site/media/js/eventgallery.js
added picasa sync view
fixed date import during picasa import
always load the component configuration so even modules will work.
docu update
added picasa import to the top menu bar.
fixed typo
fixes type
added configuration parameter for css class to modules
fixes #51
added menu item ids to the links to events and single item pages.
fixes #50
splitted code for showing and event for better re-usability
- make sure the javascript runs just one time per page.
- hide the cart button if the global preferences are set to off.
added ability to use the imagelist to the content plugin
reworked advanced options for modules