Added destroy lifecycle method

[kmalakoff]

With single page apps, you may want to manage the lifecycle of the DOM more precisely. I have added a pull request for a destroy method that can be used to clean up the events when pages change.

[zenorocha]

Hey @kmalakoff, that would be a good addition.

Here are some things that could be improved:

• According to delegate-events docs, the 3rd param is a callback so we don't need that when unbinding.
• Destroy method should be added on ClipboardAction too and Clipboard should call it.

[kmalakoff]

All of those sound good assuming one instance of Clipboard is managed as a group.

FYI: I originally tried to use ClipboardAction directly (understanding the event delegation tradeoff) given #25 since it wold be easier to integrate with React so definitely a destroy on the ClipboardAction could be good to expose a lower-level API. That said, after multiple attempts, I couldn't get it to work so settled with the jQuery approach using Clipboard.

[zenorocha]

Just started reviewing :)

Sent from GH.

[zenorocha]

Thank you, pull request merged!

Sent from GH.

[zenorocha]

Merged, tested and documented. Would you mind checking the final result and leave your opinions? Thanks for contributing @kmalakoff.

[kmalakoff]

Yeah, works well. Thanks!