New markers

Hooray!
Slider sets Markes from data
Merge branch 'master' of https://github.com/HistoryCampus/HistoryMap
slider updates markers (now for real!)
real data!
Folder re-arrangement
Added Fancybox for detail level 3
Merge branch 'master' of https://github.com/HistoryCampus/HistoryMap
Merged Fancybox into updated index.htm
Added a formal specification of displayed data
Moved the pop-ups "above" the markers
update marker positions on resize
Added the libraries used into the GitHub-readme
Removed transparency of the markers

Overlapping markers could not be separated from each other before.
Renamed the markers to match the perspectives
smaller markers and corrected positioning
templating! WOHOW!