added pictures because i hate all those 404 errors in the log. and i like
chuck norris, too. ROUNDHOUSE KICK!
show details of a talk in a modal dialog instead of toggling the details
on the main tracks view
clean up unneeded stuff
added a test for the talk view
Merge pull request #30 from SchweizerischeBundesbahnen/feature/mfr/talkdetailview

Feature/mfr/talkdetailview