Adding install instructions to readme.
Prepare 0.1.2 release
Changes default keys to shift+enter.

- I think this should have a lot less collisions in typing.
- I hadn't experimented much with shift+space because I was using
  cmd-space.  Unfortunately that collides with a lot of people.
Prepare 0.1.3 release
Some performance and cleanup.
Moving the getEditor() to the top of the loop.

- Minor to no gains in performance of course, but a little more clear.