Fix Rubric/Mixeval add/edit textareas overflow.

Broken due to new css applied to all textareas. Width in rubric really
should be done in the css file instead when the page is refactored.
Add header to force IE to standards mode.

IE can be configured to use 'Compatiblity View' for all websites, which
will try to render iPeer like IE6 or something. Even if you have a valid
doctype begging the browser to use a specific standard. For some reason,
you have to add an IE specific header 'X-UA-Compatible' in order to make
sure that IE goes to standards mode.

IE=edge means that rendering will be done with the most advanced
rendering engine available.

chrome=1 means enable Google Chrome Frames, if anybody is using it.
Use rel attr to define favicon, smaller favicon.

Favicon size was reduced by converting it into PNG. It's now <1kb.

We've been relying on the predefined URL favicon loading, but the
preferred method of loading favicons is to use a rel attribute:
http://www.w3.org/2005/10/howto-favicon
IE can't handle js arrays with extra commas.

An array specified like [1,2,3,4,] works in FF and Chrome, but IE can't
handle it due to the last extra comma, it wants it in the format
[1,2,3,4]. Fixed a few cases where we had extra commas.
Upgrade jquery.dataTables from 1.9.1 to 1.9.4.