Warn new users we are using a little known format (cson), not the more popular json doc notation.

improper trailing and leading spaces can cause your bindings to fail.Since cson has very little adoption relative to json, I think it's important to warn new users that they need to understand CoffeeScript notation or else a single space could break their file. I spent one full hour today trying to get an auto-indent mapping to work. The solution involved adding one leading space!
ah I see. Yes of course.
Just thought it might save some people a bit of frustration.

*Max Hodges* | Partner at White Rabbit Japan <http://whiterabbitjapan.com> |
t 03.6303.1840 | m 090.1795.4446

On Thu, Oct 16, 2014 at 6:58 PM, Dan Pythonic <notifications@github.com>
wrote:

> In dot-atom/keymap.cson:
>
> > @@ -19,3 +19,5 @@
> >  # You can find more information about keymaps in these guides:
> >  # * https://atom.io/docs/latest/customizing-atom#customizing-key-bindings
> >  # * https://atom.io/docs/latest/advanced/keymaps
> > +#
> > +# Bindings not working? Be aware that cson follows CoffeeScript notation with differs from json.
>
> should this say *which* instead of *with* ?
>
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