Updated URL Routing Method

In order to better handle more complicated features in the future I
reimplemented the routing mechanisms to use webapp2.Route objects.
They allow for named parameters using regex matching.
Merge branch 'master' of github.com:benjic/gdg-url
Pass latest ShortUrls to View

A list of the last ten items and host name is passed to all views to allow a list of latests ShortUrls to be posted.
Updated View to Iterate Recent URLs