add validates_timeliness gem
remove cucumbers that are no longer required
port old website user validation specs
add site_prism auth section to pages
validate uniqueness of email
Constrain bowndler to ~> 1.0
remove custom devise rack failure app
Unpin the frontend-assets dough commit.

Relevant changes that were being pinned to avoid have been rolled back in dough.
Merge pull request #591 from moneyadviceservice/unpin-frontend-assets

Unpin the frontend-assets dough commit
Bump pensions_calculator version.
sign in error now uses dough validation summary

instead of a flash message
add comment to make override more obvious
Merge pull request #592 from moneyadviceservice/sign-in-validation

Sign in validation
use capybara have_content assertions
Improve readability of a cucumber test
Remove unused baseline_grid helper
Merge pull request #595 from moneyadviceservice/remove_baseline_helper

Remove unused baseline_grid helper
Add title to home page
Add a helper to output accessible heading tags
Merge pull request #596 from moneyadviceservice/accessible_headings_helper

[WIP] Accessible headings helper