Add notice about IE6 deprecation

[Paul Everitt]

We need a place on all the layouts (generic layout, community layout, etc.) that tells IE6 users and only IE6 users that we're deprecating IE6.

1) Find a place to make it visible. Style it nicely. Perhaps use the stock jQuery UI CSS conventions for a warning. For location, perhaps in the whitespace above the KARL logo?

2) Come up with a scheme to make it only visible to them. For example, make it display:none and have some JS that activates it.

3) Here is the notice:

  KARL is detecting that your web browser in out of date. Using an out of date browser will
  cause some KARL features to not work properly. Please click here to download a newer
  version of your browser (link to Internet Explorer site).

[Chrissy Wainwright (chrissy)]

I added this to the site announcement macro, surrounded in [if IE 6] condition. It will display above the site announcement, if there is one.

[JimPGlenn (jpglenn09)]

fixed

[Paul Everitt (paul-agendaless)]

I changed this to the text Jo recommended:

You are currently accessing KARL with Internet Explorer 6. This is an old browser which we are no longer fully supporting, and you may find that some features do not work properly. We recommend that you use another browser: you can <click here> to download a newer version of Internet Explorer. If you cannot install software on your computer, please contact your local IT support.