added more ioloop docs to make alternative implementations easier
added more ioloop docs to make alternative implementations easier

kberov/mojo,zoffixznet/mojo,Grinnz/mojo,jamadam/mojo,kak-tus/mojo,kiwiroy/mojo,scottw/mojo,jenalgit/mojo,vlet/mojo,CandyAngel/mojo,polettix/mojo,areggiori/mojo,kraih/mojo,lindleyw/mojo,melezhik/mojo,augensalat/mojo,andrewsolomon/mojo,dotandimet/mojo,melezhik/mojo,vlet/mojo,zoffixznet/mojo,s1037989/mojo,andrewsolomon/mojo,s1037989/mojo,jenalgit/mojo,chenri/mojo,dolmen/p5-Mojolicious,marcusramberg/mojo