Add support for [email protected], update example using webpack

[jaxrtech]

This updates the plugin for support with [email protected]. The example also works again as I've setup Webpack to properly bundle the plugin with the example.

I don't know if this was a previous bug, but the input is always a keystoke behind since the callback is invoked onKeyDown which is not going to have yet appended the next character from the keystoke. This will have to be separately fixed (?).

Sidenote: This is the same PR I've submitted to one of the forked repos and likewise not all these commits are mine per se but brings the plugin to a current working state
(see also XuHaoJun#1)

[aunswjx]

I'm no longer belongs to Oozou company anymore. I think you could asked this guy @dynjo to have someone from the company to maintain it. Personally, I still want to continue contribute to this repo too.