adds route-spec function to IRouteMatches protocol to return original route; returns original route as locate-route's third vector value
renamed route-spec -> orig-route for clarity and to avoid name collision with function
Post IRC discussion: breaks IRouteValue/route-value out into its own protocol; turns locate-route's return args into a hash-map; adds sugar function locate-route-value
Merge pull request #28 from ddellacosta/master

Add IRouteValue protocol to return original route