Update the restbuck_client, still work in progress.

Update restbuck_server, remove unused class in inherit.
Update libcurl_http_client_request, to parse context headers before the
execution.
Update wgi_input_stream, commented precondition.

examples/restbucksCRUD/src/restbucks_server.e

@@ -12,8 +12,6 @@ inherit
 
 	URI_TEMPLATE_ROUTED_SERVICE
 
-	ROUTED_SERVICE_HELPER
-
 	DEFAULT_SERVICE
 
 create