Possibility to protect some endpoints with basic-auth

user:passwd pair should be configured in restapi section of main
configuration file in following format:
restapi:
  auth: 'username:password'

Plus implemented some simple routing mechanisms:
GET /foo => do_GET_foo()
POST /bar => do_POST_bar()

postgres0.yml

@@ -4,6 +4,7 @@ scope: &scope batman
 restapi:
   listen: 127.0.0.1:8008
   connect_address: 127.0.0.1:8008
+  auth: 'username:password'
 etcd:
   scope: *scope
   ttl: *ttl