Feature/relations in index

[clemens-tolboom]

• [x] Add traits and implements to index
• [x] Fixed some minor usage errs
• [x] Add index.html for a d3js animation of generated index file.
• [x] Add uml-generator-php.yml.dist file and user feedback when using run
• [ ] Needs README update
• [x] Add favicon.ico
• [ ] Add meta tags
• [x] Fix for Firefox

[clemens-tolboom]

This still needs some few tweaks now we generate a web page form the index.

[clemens-tolboom]

Darn ... it's broken on Firefox now. See http://clemens-tolboom.github.io/uml-generator-php/animations/self/ using Firefox.

[clemens-tolboom]

Fix for Firefox was to add the color after the gradient. Somehow the line style in

function addGradient(svg, name, startColor, stopColor) {
    svg.append("radialGradient")

is not done in FF?

[clemens-tolboom]

This PR is getting to big. Will merge ASAP then file bugs :-(