[BIS2035] ability to accept terms for cookies

store it only on client's side. So it doesn't conflict with varnish

[podio story](https://podio.com/bitzesty/bis-phase-2/apps/stories/items/37)
Fixed styling of the T&Cs pop up

Conflicts:
	app/views/schemes/_terms.html.slim
Fixed the cookie style

Conflicts:
	app/assets/stylesheets/views/search.css.scss
	app/views/layouts/_cookies.html.slim
Fixes for IE
Fixes to the cookie and T&C pop up
use `capybara-webkit` instead of `poltergeist`
do not use `js` on test
Merge pull request #35 from bitzesty/remove-poltergeist

use `capybara-webkit` instead of `poltergeist`
Merge pull request #34 from bitzesty/BIS2035-agreement-client-side

[BIS2035] ability to accept terms for cookies