ChildAttr only returns one child, not all children about colly

[asciimoo]

@AwolDes thanks for your feedback. This behavior comes from the goquery package and I found it intuitive - perhaps it isn't. Goquery returns the text of all the descendants of the matched element.
Maybe, we should add an e.ChildAttrs() function which returns with a list of all matching element's attributes. What do you think?

[AwolDes]

@asciimoo I think it would be good to add the e.ChildAttrs() function so that a HTML snippet like the following:

<div class="block-elem">
  <div class="container">
    <span class="span-class">Text</span>
  </div>
  <div class="container">
    <span class="span-class">Text2</span>
  </div>
</div>

Could be easily parsed with something like

c.OnHTML("div.block-elem", func(e *colly.HTMLElement) {
  spanClass := e.ChildAttrs("span", "class")
})

To get all the span classes, instead of just the first match

[asciimoo]

Added in ac6587e