Move cookie message above header

This prevents the situation where the cookie message, phase banner and
survey compete for attention under the header.
Merge pull request #81 from gemmaleigh/move-cookie-message

Move cookie message above header
Don't HTML-escape the assetPath with Mustache

Use Mustache's 3 curly braces to indicate that we don't want the
assetPath variable to be HTML escaped.

The assetPath is referenced from inside the href attribute of link
tags, and is generally formed of either a path or a URL containing
a hostname.

Currently, the template outputs HTML like this:

    <link href="https:&#x2F;&#x2F;foo.service.gov.uk&#x2F;css&#x2F;stylesheets/govuk-template.css" />

This commit changes it to something more like this:

    <link href="https://foo.service.gov.uk/css/stylesheets/govuk-template.css" />
Merge pull request #82 from alphagov/html-escaping-of-assetpath

Don't HTML-escape the assetPath with Mustache
Bump to v0.8.0
Update propsition navigation colours

Use a GOV.UK brand colour for the proposition navigation active colour
rather than a soon to be depricated department and policy turquoise.

Use black text for focus as it puts a yellow background on the links and
it doesn't hit contrast with white on yellow.
Move previously custom WH logic to align nav when there's no proposition title, expose it via a class name that apps can control
Re-order focus style so that the active nav link focus colour isn't overridden
Merge pull request #83 from alphagov/update-proposition-link-colours

Update propsition navigation colours
Bump to 0.8.1 - minor visual changes to proposition header defaults