Revert watcher to use howeyc/fsnotify
Revert watcher to use howeyc/fsnotify

(Since merging https://github.com/howeyc/fsnotify/commit/432c817ae4d60300a5fbafd190ded5b93d992d5a)
lili2311/revel,huacnlee/revel,zacklin923/revel,revel/revel,veliamsli/revel,folpindo/revel,shima-park/revel,Gazillion-Platform-Team/revel,lili2311/revel,klauspost/revel,folpindo/revel,trigrass2/revel,James0tang/revel,Jxspy/revel,jenalgit/revel,lili2311/revel,notzippy/revel,Jxspy/revel,cavaliercoder/revel,pathirana/revel,vahid-sohrabloo/revel,jmptrader/revel,ggerman/revel,veliamsli/revel,yext/revel,roblillack/mars,PatidarWeb/revel,cokeboL/revel,zog/revel,shima-park/revel,lgscofield/revel,notzippy/revel,cw2018/revel,imjerrybao/revel,Gazillion-Platform-Team/revel,mattbaird/revel,roblillack/mars,notzippy/revel,pathirana/revel,cokeboL/revel,tempbottle/revel,marklap/revel,salixvideo/revel,w4ngyi/revel,cw2018/revel,nubleer/revel,ggerman/revel,folpindo/revel,ggerman/revel,marklap/revel,cokeboL/revel,zacklin923/revel,cavaliercoder/revel,Jxspy/revel,yext/revel,Gazillion-Platform-Team/revel,birkirb/revel,roblillack/revel,trigrass2/revel,shima-park/revel,hongrich/revel,James0tang/revel,runner-mei/revel,tempbottle/revel,metafex/revel,trigrass2/revel,runner-mei/revel,James0tang/revel,lgscofield/revel,pathirana/revel,zog/revel,hongrich/revel,cw2018/revel,tempbottle/revel,marklap/revel,imjerrybao/revel,webdev1001/revel,roblillack/revel,hustbill/revel,revel/revel,jenalgit/revel,lgscofield/revel,w4ngyi/revel,hongrich/revel,robfig/revel,huacnlee/revel,salixvideo/revel,roblillack/revel,w4ngyi/revel,vahid-sohrabloo/revel,jenalgit/revel,zog/revel,yext/revel,imjerrybao/revel,jmptrader/revel,vahid-sohrabloo/revel,hustbill/revel,jmptrader/revel,birkirb/revel,salixvideo/revel,hustbill/revel,kaneshin/revel-revel,veliamsli/revel,nubleer/revel,birkirb/revel,kaneshin/revel-revel,huacnlee/revel,zacklin923/revel,cavaliercoder/revel