First commit.
Added warning message when javascript is disabled.
Added warning message when a browser does not support the File API specification.
Moved warning message code into a function.
Added warning message when a date can't be parsed by the browser.
Now using Puma on Heroku.

Updated development instructions accordingly.
Made area charts responsive.

A lot of global variables were introduced here, wish I knew how to
JavaScript better.
Added sample data.