allow overrides, call handler with the event

@lpender  This PR sets the context for the event handler as the jQuery object that `resizeSettle` was called on and calls it with the resize event. It allows you to do:

```javascript
$(window).resizeSettle(function(e) {
    console.log(e);
});
```

Additionally, I deleted a couple of unused variables (`ob` and `bJustSized`) and got rid of the inner `"use strict";`.
I also changed the name `oCfg` to `config` and switched from the single-line `if` style to the bracket style.

How do you feel about these things?