Guidance on certs and subdomain names
Remove suggestion of www-preview and www-dev

We don't want to encourage using the same wildcard certificate for
production, staging and development environments.
Fix meta-data and more descriptive name
Explicit advice against bad idea
Add hyphenated options back in

Hyphens in themselves are not a bad thing. We now have explicit advice
against using the same certificates in different environments.
Use root-relative URLs with .html suffix

I don't think this is strictly necessary, but it's what we're doing
elsewhere in the product. Homogeneity is sometimes a good thing.
Add section on new identity assurance in induction programme

As reviewed by Janet Hughes
Merge pull request #261 from mattedgar/induction-and-development

Add section on new identity assurance in induction programme
Guidance on closing down service subdomains
Add user satisfaction survey bar

For gathering data about moving the Service Manual to Whitehall.

https://www.pivotaltracker.com/story/show/60397410
Broken link fixed
typo error fixed
Try to make it simpler
Disable the creation of gzipped assets
Link to guidance on look and feel
Merge pull request #265 from alphagov/standard-link

Link to guidance on look and feel
Add service.gov.uk lifecycle reference to retirement
Clarify 'live longer than' sentence

This was unclear in its previous form. Now changed to match previous
less ambiguous language.
Improve DNS guidance

Many services are being sent to the Infrastructure Team without
either the correct information about DNS servers, or are expecting
GDS to host the DNS for their service.

This PR makes it much more explicit about how service.gov.uk DNS
management differs from direct.gov.uk management and what information
needs to be provided.
Merge pull request #266 from alphagov/closing-down-service-subdomains

Guidance on closing down service subdomains