[MlMt] Fastmail keybindings

[Jeffrey Horn]

Hi,

I've made a keybindings file to emulate Fastmail, modeled after the 
included Gmail keybindings. You can grab the file here: 
https://gist.github.com/jrhorn424/7496538

So far things work as expected (though I was getting weird bugs that I 
fixed by removing extraneous newlines). The only thing that is odd is 
that selectWithFilter isn't behaving as expected. Whether I choose read, 
unread, flagged, or not flagged, all messages within the current mailbox 
are selected.

Feedback welcome!

--
Jeffrey Horn
http://hello.jrhorn.me/