Tweak design of dashboard and page heading

Since the suppliers will be editing their company info back in the
Digital Marketplace it doesn't make sense to show their DUNs number
etc. in this app.

Instead this surfaces what (I think) is more important information:
Which company you are submitting services on behalf of and who you
are logged in as.

Also makes the header on the dashboard look more like the header on
the question pages.
[ts][6137] read cookie and get the suppler id
Merge branch 'master' of github.com:alphagov/supplier-submission-portal
[ts][6137] ignore test
Make first page use correct data…

…as much as possible.

Also does more more spacing tweaks.
Remove Selenium tests because auto-test hangs and can't be fixed - the HTMLUnit headless browser dies on our JavaScript just trying to open the home page.
Document storage trial run in /documents - document validation added to controllers.
Merge branch 'master' of https://github.com/alphagov/supplier-submission-portal
Merge pull request #28 from alphagov/fix_selenium

Remove Selenium tests because auto-test hangs and can't be fixed - the H...
Merge branch 'master' of https://github.com/alphagov/supplier-submission-portal
Merge pull request #27 from alphagov/first-page

Make first page use correct data…
Merge branch 'master' of https://github.com/alphagov/supplier-submission-portal
Merge pull request #25 from alphagov/new-homepage-title

Tweak design of dashboard and page heading
Add assurance tag
Add questions for pages 23-36
Correct the padding on selection-buttons
Remove file validation for now.
Change name attribute of file upload fields

Move from using eg. content.get('p6q1val1') which gives
"service-definition-document" to an id/name, eg. p6q1
Show content not key on page 21
Merge pull request #30 from alphagov/rename-file-uploads

Change name attribute of file upload fields