Use SASS style imports for admin stylesheets
Don't duplicate admin styles

* Remove extra admin stylesheet include
* Update conditional stylesheets to start with admin.css rather than
base.css, so that all styles for bootstrap, jquery-ui etc are included
Remove skip_commit option from router calls.

As of gds-api-adapters 11.x this option is now the default (and is also
ignored).  Remove it to avoid confusion.
Merge pull request #1607 from alphagov/remove_router_skip_commit

Remove skip_commit option from router calls.
Bump gds-sso to 9.3.0

This is to fix an issue with transfer ot bearer tokens. See
https://github.com/alphagov/signonotron2/pull/245 for details.
Fix JS in old IEs by removing trailing comma

* Was fine on live because comma was stripped out
* Made it difficult to test new javascript features on IE7
Merge pull request #1604 from alphagov/remove-dupe-css

Don’t load admin CSS twice
Merge pull request #1606 from alphagov/bump_gds-sso

Bump gds-sso to 9.3.0
Merge pull request #1610 from alphagov/fix-ie7-js-in-dev

Fix JS in old IEs by removing trailing comma