Add keyboard shortcuts to split-screen typing mode

Maybe.

http://davidwalsh.name/keyboard-shortcuts

http://davidwalsh.name/demo/keyboard-shortcuts.php

http://craig.is/killing/mice

https://github.com/ccampbell/mousetrap

https://github.com/ccampbell/mousetrap/tree/master/plugins/global-bind

http://jothut.com/demos/javascript/mousetrap/test.html

Only need 2 to 4 shortcuts.

#junco
#todo