随机生成UserAgent的python库（fake-useragent库）

(^o^)/~完美

　　>> ua.random
　　u'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chr
　　ome/27.0.1453.93 Safari/537.36'
　　>> ua.random
　　u'Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chr
　　ome/30.0.1599.17 Safari/537.36'
　　>> ua.random
　　u'Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chr
　　ome/30.0.1599.17 Safari/537.36'
　　>> ua.random
　　u'Mozilla/5.0 (Windows NT 6.4; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chr
　　ome/41.0.2225.0 Safari/537.36'
　　>> ua.random
　　u'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_0) AppleWebKit/537.36 (KHTML, like
　　Gecko) Chrome/32.0.1664.3 Safari/537.36'
　　>> ua.random
　　u'Mozilla/5.0 (X11; CrOS i686 4319.74.0) AppleWebKit/537.36 (KHTML, like Gecko)
　　Chrome/29.0.1547.57 Safari/537.36'
　　>> ua.random
　　u'Mozilla/5.0 (Windows NT 6.2; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko
　　) Chrome/32.0.1667.0 Safari/537.36'
　　>> ua.random
　　u'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:24.0) Gecko/20100101 Firefox/24.0'
　　>> ua.random
　　u'Mozilla/5.0 (Windows NT 10.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/40
　　.0.2214.93 Safari/537.36'
　　>> ua.random
　　u'Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2;
　　.NET CLR 2.0.50727; InfoPath.3; .NET4.0C; .NET4.0E; .NET CLR 3.5.30729; .NET CLR
　　3.0.30729; MS-RTC LM 8)'
　　>>