Minor change in cookie warning styling.
Minor change in noscript warning text.
Put cookie notice at the bottom of the page. Minor change in spanish text.
Show cookies warning in the user profile page.
If a "accepted_cookies" cookie is set with value "true", do not show the cookie notice.

Also increase close button opacity in the cookie notice. It was too easy to overlook it, and I don't want user complaining about an undismissable cookies message.
Added a tooltip to the "accept" button in the cookies warning.
Added ngCookies module to the angularJS client, to be able to set/read cookies.
Implemented angularjs service to set the "accepted_cookies" cookie.

Not yet implemented: this cookie will be set with value "true" when the user clicks on the "accept" button of the cookies warning message. If this cookie is set to "true", the cookies warning message won't be displayed.