Add MathJax files & config to the conference pages
Add MathJax files & config to the conference pages

 - fixes #1803

DirkHoffmann/indico,OmeGak/indico,indico/indico,pferreir/indico,DirkHoffmann/indico,ThiefMaster/indico,indico/indico,mvidalgarcia/indico,DirkHoffmann/indico,OmeGak/indico,pferreir/indico,indico/indico,pferreir/indico,indico/indico,ThiefMaster/indico,mvidalgarcia/indico,DirkHoffmann/indico,mic4ael/indico,ThiefMaster/indico,mvidalgarcia/indico,mic4ael/indico,pferreir/indico,mic4ael/indico,OmeGak/indico,ThiefMaster/indico,OmeGak/indico,mic4ael/indico,mvidalgarcia/indico