don't show use_live_postcode_lookup on summary view
Merge pull request #538 from ministryofjustice/rm_live_postcode_from_summary

Don't show use_live_postcode_lookup on summary view
updated govuk_frontend_toolkit; and added govuk_elements gem (not released yet)
replace old stylesheets with new govuk_elements_extensions sass file, which reuses govuk_elements sass
center content by wrapping content in main#page-container element; remove .page-header to fix header formatting
remove divider row between claimants
use govuk elements js to set border on focus for radio and checkbox labels
require bind.js to enable tests to run; phantomjs does not support bind() natively
add .js-enabled .hide and .js-only .js-enabled styles to fix show/hide functionality when JS enabled
change to form date css classes from govuk elements
import elements files separately as required; extend validation error styles
use .heading-small style for validation summary header
import elements/buttons
use govuk_elements_rails gem
update spec for new form-date css class names
use details element for claimant contact panels; spec for checking panel is opened if input fields contain values
updated jasmine-rails version
add details.polyfill.js modified to enable testing with jasmine to work
use details/summary elements for optional parts in claimant contact section; removed unneeded coffeescript; updated specs
removed unneeded claimant_contact_js.js