added Time.since returning Duration from time to now
added Time.since returning Duration from time to now

stremlenye/util,stremlenye/util,BuoyantIO/twitter-util,wuqiangxjtu/util,stremlenye/util,tenghuihua/util,tdyas/util,edombowsky/util,Jiri-Kremser/util,edombowsky/util,mosesn/util,twitter/util,mosesn/util,cogitate/twitter-util-uuid,edombowsky/util,LitmusHealth/twitter-utils,tenghuihua/util,wuqiangxjtu/util,LitmusHealth/twitter-utils,luciferous/util,LitmusHealth/twitter-utils,LitmusHealth/twitter-utils,folone/util,twitter/util,edombowsky/util,twitter/util,tenghuihua/util,luciferous/util,RUNDSP/util,hydro2k/util,mosesn/util,folone/util,folone/util,tdyas/util,travisbrown/util,slackhappy/util,wuqiangxjtu/util,BuoyantIO/twitter-util,cogitate/twitter-util-uuid,Jiri-Kremser/util,tdyas/util,Jiri-Kremser/util,nkhuyu/util,hydro2k/util,cogitate/twitter-util-uuid,tdyas/util,RUNDSP/util,luciferous/util,RUNDSP/util,luciferous/util,slackhappy/util,nkhuyu/util,travisbrown/util,Jiri-Kremser/util,cogitate/twitter-util-uuid,nkhuyu/util,travisbrown/util,nkhuyu/util,folone/util,slackhappy/util,hydro2k/util,hydro2k/util,travisbrown/util,tenghuihua/util,wuqiangxjtu/util,BuoyantIO/twitter-util,slackhappy/util,BuoyantIO/twitter-util,stremlenye/util,RUNDSP/util