Trigger "change" event after changing this.value = fb.color

[rxaviers]

Farbtastic updates input element value with the chosen color (when using an element as the callback). Although, it's not possible right now to be acknowledged when those changes happen.

This commit triggers the native change event after the color is set. So, user can bind the native "change" event as he would normally do and be notified when a new color is set.

PS: Added a delay mechanism to avoid triggering a bunch of events while sliding the colors.

[ben-eb]

What's the status of this patch?