Remove cruft.
Documentation streamlining
Introduce .gitattributes to fix crlf issues
Remove cruft, improve doc
Authorship
Introduce date filtering.

Add a new attachment browser toolbar, tertiary, where we put the
search interface. Replaces the on-hover dropdown with an onClick
toggle to show interface.

Introduce jQuery UI CSS (ripped straight from Helen's repo)
for the jQuery UI Datepicker.