improved documentation.

params.yml

@@ -17,11 +17,4 @@ ServingAddress: 0.0.0.0
 MongoServers:
     -
       name: localhost
-      url: localhost:27017
-    -
-      name: mongolab
-      url: mongodb://ustraca:9OApiiV9En85bBFGfVyYKH4C@ds049288.mongolab.com:49288/ustraca
-
-    -
-     name: miaou
-     url: 192.168.1.11:27017
+      url: localhost:27017