timer: make sure emitters catch up their timers
timer: make sure emitters catch up their timers

If a dispatch takes longer than 100ms, an emitter will start to
fall behind on timer dispatches.  Make sure we catch up each time
we dispatch a timer trigger.

zhenglaizhang/libphenom,sakishum/libphenom,facebook/libphenom,ChinaLongGanHu/libphenom,dailypips/libphenom,zhakui/libphenom,yangjin-unique/libphenom,facebook/libphenom,ChinaLongGanHu/libphenom,sakishum/libphenom,yangjin-unique/libphenom,sakishum/libphenom,facebook/libphenom,seem-sky/libphenom,rogerchina/libphenom,ChinaLongGanHu/libphenom,seem-sky/libphenom,dailypips/libphenom,zhenglaizhang/libphenom,rogerchina/libphenom,zhenglaizhang/libphenom,rogerchina/libphenom,ChinaLongGanHu/libphenom,mhaberler/libphenom,zhenglaizhang/libphenom,facebook/libphenom,facebook/libphenom,zhakui/libphenom,ChinaLongGanHu/libphenom,mhaberler/libphenom,zhakui/libphenom,zhakui/libphenom,mhaberler/libphenom,seem-sky/libphenom,sakishum/libphenom,rogerchina/libphenom,mhaberler/libphenom,dailypips/libphenom,yangjin-unique/libphenom,yangjin-unique/libphenom,dailypips/libphenom,yangjin-unique/libphenom,sakishum/libphenom,rogerchina/libphenom,seem-sky/libphenom,zhenglaizhang/libphenom,dailypips/libphenom,zhakui/libphenom,seem-sky/libphenom,mhaberler/libphenom