Added links and images to two new prototypes.

One shows ambassador Twitter networks and the other attempt at GOV.UK anomaly setection
Update config to point at production data by default

We've agreed that we should develop against production data by
default. Update our config files to do this.

Also update the path to govukHost.
Merge pull request #619 from alphagov/feature/use-production-data

Update config to point at production data by default
Update Basic Auth process for Express

Express 4.x no longer supports Basic Auth, so use the node-basicauth
package instead. We use Basic Auth to password-protect our sites
on Heroku if required.
Update README with Basic Auth instructions for Heroku
Merge pull request #620 from alphagov/bugfix/allow-heroku-basic-auth

Fix Basic Auth for new version of Express
Merge pull request #617 from alphagov/feature/FCO_Traffic_Prototypes

Added links and images to two new prototypes.
Amend text on visit visa dashboard

Story: https://www.pivotaltracker.com/story/show/74205142
Merge pull request #623 from alphagov/bugfix/text-change-for-visit-visas

Amend text on visit visa dashboard
Converted journey module to use single-dimensional collections
Only listen to reset event on collections

Listening to sync *and* reset means that the event binding is not removed for later `reset`s once sync fires, since `listenOnce` does not unbind other event names when one event has fired once when called with multiple events.
Move client-side polling from realtime collection into specific client-side file

To avoid having client-only code paths in server-side/shared code
Convert collections to be single-dimensional
Remove redundant `fetchOptions` config

Client-side collection automatically sets cachecontrol header to match its `updateInterval`
Converted views to use single-dimensional collection with standard collection methods for data querying
Stop requiring lines and groups to be indexed
Renamed vars in list collection to better reflect inheritance
Remove getValues method from collections as it's no longer used anywhere
Use collection methods for totalling things
Remove code to set valueAttr at runtime

It does not need doing anymore since tabs were refactored *a long time ago*. We can just set on initialize.