Describe license in README
Add small section about contributing
Remove trailing whitespace
Remove IE 9 compatible CSS

We don't support that version right now and the filter doesn't look
good anyway.
Cleanup CSS gradient

We only support modern browses, so I got rid of all the vendor
prefixed properties. The standard linear-gradient property is
supported in IE 10+, Firefox 29+, and Chrome 34+. Older browsers will
see a red background.
Reorder CSS rules

This puts the rules roughly in the document order.
Remove unnecessary link
Combine unnecessary main class with body element
Remove element styles, use stylesheet instead
Remove AJAX log

It didn't work very well: it showed the same URL most of the time
since most calls go to the account URL.
Correct indentation