Support setting the API key via an environment variable
Merge pull request #9 from jasonkiss/master

some semantic markup changes to the Customise dialog
Adding JSON dump to the page

For accessing data for the graphs. I've now removed the demo data.

Also todo with this data:
 - render dynamically the sources template
Merge pull request #10 from jamesmacfie/bentoRua

Adding JSON dump to the page
semantic markup for main events listing

Notably made each month’s list of events an unordered list. Each month
is its own <section> with @aria-labelledby referencing the @id of the
child <h2>. That @id is the name of the month, which should be fine as
long as we don’t list events more than 12 months in advance.
Also cleaned up extraneous attributes on <main>.