Remove IE6 support

[Ciki]

I think time to remove support for IE6 has come (long ago :) ). See *.css files

[paulbors]

I second this, see:
http://www.ie6countdown.com/‎

Also, with IE10 I get the following error:
SCRIPT5007: Unable to get property 'msie' of undefined or null reference
jquery.jgrowl.js, line 38 character 1

That line is:
if(a.browser.msie&&parseInt(a.browser.version)<7){a(this.element).addClass("ie6")

That's with jGrowl v1.1.1 and because of this, the first message is always lost.
This is not a problem with the latest jGrowl v1.2.13.

[stanlemon]

I think this is a compelling thought for a 2.x, sort of do it like jQuery has done core. Thoughts?

[stanlemon]

ie6 support has been removed in the dev branch