Responsive display for small screens

A number of pages and forms are very difficult to view or use on small screens. Although CiviMobile will help these users, the regular display should at least respond in ways that help small screen users. This patch implements a script that handles all "advanced multi-select fields", the contact summary page, and the name portion of the contact edit page. It uses jQuery to add classes, and with the exception of one screwy place in the contact view template (which should be fixed, but is a separate issue), it leaves all formatting to the civicrm.css file, which a site's theme can override.