Remove text from about page at Rosalie's request
Change 'Developers' to 'Get a dashboard'…

…at Rosalie’s request
Remove Blog from nav at Matt Sheret's request
Moved the impact number to the right.
Add line to the bottom of single line graphs.

Remove the fill colour.
Merge pull request #688 from alphagov/about-and-nav-tweaks

Tweaks to the about page and navigation
Fix total-vat-registered-businesses
Fix vat-registrations-and-deregistrations
Fix tax-collected-per-year
Fix total-cost-per-year
Rename cost-of-collection-per-100-pound
Fix total-tax-collected
Fix tax-collected-by-tax-type-table
Fix cost-of-collecting-100-gbp-in-tax
Fix cost-of-collecting-100-gbp
Fix vat-collected
Fixes for vat-content dashboard
Remove total-feedback-received from vat-content
Remove modules for which data unavailable
Update hmrc-prototypes/tax dashboard