SAGE Knowledge translator (new)

Sample URL:
http://knowledge.sagepub.com/view/10-winning-strategies-for-leaders-in-the-classroom/SAGE.xml?rskey=yrcpOl&row=1
You might have a good reason to do this, but I think using `item.tags = ZU.xpath(...).map(function(v) { return ZU.trimInternal(v.textContent) })` would avoid splitting on commas inside a keyword.