Create structure for Sinatra

- public directory
  - JS, pde scrpt and favicon
- views
  - haml views
Add canvas element to index

- call pde script with 'data-processing-sources'
  ? Need to investigate about it.
Delete index.htmlx
Delete useless lines
Resize canvas

- Not in HTML, in pde setup routine #FTW!
  <O> How to integrate it in a HTML5 grid
Remove warning about Chrome

Chrome does not loads scripts directly from filesystem.
Merge branch 'sinatra' into dev