By Tomoko A. Hosaka The Associated Press TOKYO (AP) — Twitter’s 20 billionth message didn’t make much sense, but it spoke volumes about the rapid global growth of the microblogging service. It came at 12:44 a.m. Sunday (1544 GMT, 11:44 a.m. EDT Saturday) from user “GGGGGGo—Lets—Go” in Japan, where Twitter has exploded in popularity over […]