Updated 'Getting Started' to use new configuration style and CDN
Updated 'Getting Started' to use new configuration style and CDN

GerHobbelt/MathJax-docs,mitya57/mathjax-docs,mitya57/mathjax-docs,Axure/MathJax-docs,GerHobbelt/MathJax-docs,mathjax/MathJax-docs,Axure/MathJax-docs,mathjax/MathJax-docs