About page.
Merge branch 'master' into about-and-home-pages

Conflicts:
	create_pages.py
	templates/base.html
Only generate pages if create_page.py is called directly

-   This will prevent pages getting generated if someone
    imports create pages for any reason.
Render about page when create_pages is used
Add home page html - needs to be made dynamic
Ignore artefacts directory
Add script to build a zip of the site

Puts the artefact in the artefacts directory.
Merge branch 'master' into about-and-home-pages

Conflicts:
	.gitignore
	create_pages.py
Fetch release from a different origin and push tags
Generate homepage headlines from data
Add header, footer to home page, fix nav links
use EXPLORER_HOST variable for base url
Failing test default arguments

Client secrets and OAuth token should still be under the data directory,
by default.
Parse arguments, but provide default values
Test for parsing argument parameters
Parametrize google secret and token locations
Update with fetch parameters
Serve up local assets with correct content types
Parametrize fetching with secrets and oauth token
Merge pull request #12 from alphagov/google-auth-params

Parametrize location of google secrets and token files