place/threads: use _log to store data, threaded comments

place/archetype.gen: new save log immediately flag to save() after logAppend():
- in place/name.c:
define SAVE_LOG_IMMEDIATELY
- in local.h:
define _flag_save_place_log_immediately
define _flag_save_userthreads_immediately

place/text: added x()

world/net/twitter/client.c

@@ -46,7 +46,7 @@ void status_update(string text) {
     fetch(ua, api_base_url + "/statuses/update.json", "POST", (["status": text]));
 }
 
-#if 1 //not used, just an example
+#if 0 //not used, just an example
 void parse_home_timeline(string body, string headers, int http_status) {
     P3(("twitter/client:parse_home_timeline(%O, %O, %O)\n", body, headers, http_status))
 }