Behavior of the "Encoder" module is unexpected - two call per notch

Thanks for the PR!

This is the first one I found when I just googled for rotary encoder: http://uk.rs-online.com/web/p/products/7­377767/

I think it's like the one I have.

It'd be great if you could look at it - your code was much tidier! Perhaps (to be backwards compatible) we could have:

// original behviour
require("Encoder").connect(A1,A2,functio­n (direction) { ... });

// your behaviour
require("Encoder").connect(A1,A2,{clicks­:2, callback:function (direction) { ... }});

// other behaviour
require("Encoder").connect(A1,A2,{clicks­:4, callback:function (direction) { ... }});

Of course there might be a better name for it, but allowing the function to be changed to an object with extra parameters would be really good.