Implement new colours from the branch people

This is the latest selection of colours. I have also updated all the
varaibles to match the current slugs for the organisations.

Bumped the version of the toolkit to get the new colours which required
changing how we import the media player js.
Merge pull request #327 from alphagov/new-colours

Implement new colours from the branch people

https://www.pivotaltracker.com/story/show/45773975