fix typo, thanks @TomAkehurst
Merge pull request #413 from alphagov/typo-on-service-management

fix typo, thanks @TomAkehurst
Update requests from Tech Leadership Team
Merge pull request #412 from alphagov/code-of-practice-

Update requests from Tech Leadership Team
Upgrade dependencies

We’d like to be able to run this on heroku, so that the team
responsible for the governance project can publish their changes and do
user research before putting their content live.

There are various issues with our current dependency versions which are
preventing that.

Upgrading to latest versions of things and then we’ll make pull requests
if bugs / features are still an issue.
Fix deprecation warning

```
Deprecation: The 'pygments' configuration option has been renamed to 'highlighter'. Please update your config file accordingly. The allowed values are 'rouge', 'pygments' or null.
```
Merge pull request #417 from alphagov/feature/gem-upgrades

Upgrade dependencies
Exclude toolkit documentation from Jekyll

There's no need to compile markdown files from the toolkit root directory
into the service manual.
Merge pull request #418 from alphagov/exclude-toolkit-documentation

Exclude toolkit documentation from Jekyll
Add a Procfile

Make the application run on heroku.
Document how to run on heroku
Capitalise Heroku.

Also fix a missing a full stop.
Add robots.txt to avoid heroku sites being indexed
Merge pull request #414 from alphagov/feature/heroku

Allow the app to be run on heroku
Add stable link fragments
Fix typo

compete -> complete
Remove unnecessary punctuation
Consistent wording
Merge pull request #416 from alphagov/testing-in-agile-tweaks

Typo, punctuation and links oh my
added governance to service manual