Initial setup for MapAnnoation -> WebView complete.  Working on navigation control now.
Web view for Wikipedia article can now be correctly accessed from the MapView annotations there.  Requires putting in a Navigation controller so we have a back button on the webpage as well as hiding the navigation bar while viewing the map.
Fixed but in WebView toolbar was not displaying buttons correctly when user executes goBack all the way to the first page.  Now correctly removes goBack while still leaving goForward.
Merge pull request #24 from phreenet/jds-mapannotations-1

Map annotations -> Web View for Wiki Articles.