Add off method

[jamesfzhang]

What do you think? @peduarte See #59 for details. Thanks!

[peduarte]

Hey @jamesfzhang i'm definitely opened to this. I'll do some tests to make sure it's working and then merge.

Thanks!

[jamesfzhang]

@peduarte Fantastic. I've been using this locally for testing and it works fine. Thanks!

[peduarte]

Can you replace this comment with:
Method to bind custom event

[jamesfzhang]

Sure

[jamesfzhang]

Just updated the commit with comments.

[peduarte]

Nice one, thank you

[peduarte]

@jamesfzhang Hey,
I did some tests, and in this scenario, the off method does not seem to work.
http://codepen.io/peduarte/pen/bEzVpb?editors=1111
Scroll down to the end of the code in the JS Panel and you'll see what it is.

[jamesfzhang]

@peduarte You need to use a named function (as opposed to an anonymous function) like so:

http://codepen.io/anon/pen/adXJVx?editors=1111

[peduarte]

Ok, that's good. I'm happy with it!
Can you also update the docs to include the off method there? Then it's good to merge 👍

[jamesfzhang]

@peduarte Just updated the readme. Thanks!

[peduarte]

👍