examples: add full urls to web-service example

closes #3519

examples/web-service/index.js

@@ -69,14 +69,17 @@ var userRepos = {
 // we now can assume the api key is valid,
 // and simply expose the data
 
+// example: http://localhost:3000/api/users/?api-key=foo
 app.get('/api/users', function(req, res, next){
   res.send(users);
 });
 
+// example: http://localhost:3000/api/repos/?api-key=foo
 app.get('/api/repos', function(req, res, next){
   res.send(repos);
 });
 
+// example: http://localhost:3000/api/user/tobi/repos/?api-key=foo
 app.get('/api/user/:name/repos', function(req, res, next){
   var name = req.params.name;
   var user = userRepos[name];