Improvements to browsing and accessing thin.npr.org
* Articles have smaller line-widths for easier reading.
* Opens stories in expanded mode upon opening. No need to click
on the "Read more..." link.
* Clicking the "text-only" footer link from regular npr.org
attempts to go to the corresponding thin page, instead of the
thin.npr.org front page.
Now updated to work on text.npr.org.