JavaScript development setup

[rasmuserik]

Separating the JavaScript code from the html code, would make it easier to develop and test.

This would also make it easier to solve #390, by compiling code with backticks to a older JavaScript version supported IE.

[Daniel-Mietchen]

Re separating JavaScript and HTML, see also this project, which did this to some extent already: https://code-openness.github.io/teamThree .

[egonw]

@rasmuserik, I guess you mean the JavaScript that defines the SPARQL queries and runs them?

[rasmuserik]

Self-assigned this, as I will look into the JavaScript setup during #1411.