Update footer copyright

[Alan Noble]

No description provided.

[Saxon Milton]

Fixing this.

[Saxon Milton]

I propose adding the footer into its own HTML file and then loading using a javascript function called from init to load the HTML into a div that can be placed on each page. This would mean that there’d be only one place to update and a consistent footer on each page.

[Saxon Milton]

Instead we’re putting the footer into a footer.html file which is loaded in main.go:writeTemplat() and passed as a page data field to populate a template footer field consistent on each page. This avoids making additional request to get the footer.

[Saxon Milton]

Resolved by PR #147