Upgrade jQuery to 1.9.1

[scj1091]

Lots of breaking changes in this one, apparently. Probably worse for plugin authors, but still not trivial. Install the jQuery Migrate plugin tool v1.2.1 like so:
<script src="//code.jquery.com/jquery-migrate-1.2.1js"></script>
It will provide a wrapper to extend deprecated functions temporarily while logging a warning in the console. Should reference the jQuery 1.9 upgrade guide as well:
http://jquery.com/upgrade-guide/1.9/