69 css for diagram

[mrmurtz]

Quite a few things to review:

• css improvements to diagram
• removed validations fields throughout ejs and js files
• changed form and diagram titles, diagram uses app name when use submits (not sure what to change blank state first load title to
• changed Table#1 to First Table (also did this for Second table)
• Added html2canvas and image2canvas which allows diagram to be downloaded.
• added download button that appears only when user hits submit, this downloads the diagram image.
• we can remove the html2canvas and image downloader if you guys think it's crap