added a component api

A bit of an experiment. Any component can be accessed/scraped by visiting:
http://rizzo.lonelyplanet.com/component/COMPONENTNAMEHERE?param=value&param=value

So for example:
http://rizzo.lonelyplanet.com/component/tile?title=article%20title&link_url=http://www.ebay.com&image_alt=test

It's a first attempt at this, so comments appreciated, and no rush to merge. But testing locally provides pretty decent results, and lets us scrape UI components into microsites (php).