jQuery.widget: Add link to learn articles

[scottgonzalez]

Does this seem good enough or is there more that we should write?

I'm not thrilled about using the warning class to get the styling, but we could always just add a note class which has the same styling for now just so that we're not abusing classes.

[tjvantoll]

The wording seems fine to me.

I agree that, in general, we need a tip or note type class name to handle tangental notes like this. It would be nice to have on the learn site itself, as it currently uses a format like this:

(For example see here and here)

Maybe change the background to blue for notes?

.note {
    padding: 0.5em 1em;
    margin: 1em;
    background: #428bca;
    color: white;
    border-radius: 5px;
}
.note a {
    color: white;
}

I'm fine with whatever though. As long as we create and use the class name we can let someone with design talent make it pretty.