Get WebViewController basically working. Add lame hack so that twitter widget doesn't open in WebViewController.
update TODO
[CHANGE] navigation bars to be black in color
Rename "externalWebView" (on Web View Controller) to be "externalLinkViewer"
[FIX] process for handling internal (file:) URLs, renamed properties to distinguish between "urlToPassForward" (to another view controller) and "urlToDisplayHere." Should be ready for Victoria's content.