Example with RDF Data Cube & Linechart

[ktk]

Line chart example with Highcharts & data from RDF Data Cubes from City of Zurich, with help from @bergos .

Some remaining questions:

• I guess one could get rid of data on line 39 completely and do the mapping directly from the d3-csv structure on line 58 and 75
• I get an error on console, although it seems to render properly: TypeError: Highcharts.chart(...) is not a function
• I added the libs from CDNs, one might want to roll back to local files for our demo

It is not using d3 itself as the boilerplate for that seems to be quite large, but this would IMO fix issue #4

[vhf]

Here are suggestions: ktk#1

[ktk]

Except the CDN stuff this is now clean, I think we should still add that as an example, even if it is not directly d3. @l00mi can still do a version like that for d3. But at least people get an idea of how to use it.

[l00mi]

Fine by me, just lets reflect that in the title of the file and add a "highchartslib" somewhere?