Document Phoenix.Socket callbacks. Closes #1252
Document Phoenix.Socket callbacks. Closes #1252

iStefo/phoenix,manukall/phoenix,ericmj/phoenix,omotenko/phoenix_auth,mvidaurre/phoenix,Gazler/phoenix,pap/phoenix,optikfluffel/phoenix,lancehalvorsen/phoenix,foxnewsnetwork/phoenix,DavidAlphaFox/phoenix,manukall/phoenix,seejee/phoenix,Ben-Evolently/phoenix,seejee/phoenix,jamilabreu/phoenix,Kosmas/phoenix,ybur-yug/phoenix,lono-devices/phoenix,rafbgarcia/phoenix,trarbr/phoenix,nshafer/phoenix,CultivateHQ/phoenix,cas27/phoenix,phoenixframework/phoenix,jwarwick/phoenix,dmarkow/phoenix,optikfluffel/phoenix,cas27/phoenix,mschae/phoenix,eksperimental/phoenix,mobileoverlord/phoenix,gjaldon/phoenix,Smulligan85/phoenix,ephe-meral/phoenix,michalmuskala/phoenix,lono-devices/phoenix,iStefo/phoenix,keathley/phoenix,DavidAlphaFox/phoenix,andrewvy/phoenix,ephe-meral/phoenix,Joe-noh/phoenix,phoenixframework/phoenix,Rumel/phoenix,wsmoak/phoenix,0x00evil/phoenix,rodrigues/phoenix,andrewvy/phoenix,stevedomin/phoenix,gjaldon/phoenix,bsmr-erlang/phoenix,mvidaurre/phoenix,optikfluffel/phoenix,rafbgarcia/phoenix,lancehalvorsen/phoenix,korobkov/phoenix,rafbgarcia/phoenix,nshafer/phoenix,tony612/phoenix,CultivateHQ/phoenix,bsmr-erlang/phoenix,Kosmas/phoenix,omotenko/phoenix_auth,stevedomin/phoenix,Joe-noh/phoenix,wsmoak/phoenix,pap/phoenix,jwarwick/phoenix,nshafer/phoenix,0x00evil/phoenix,vic/phoenix,michalmuskala/phoenix,mobileoverlord/phoenix,Rumel/phoenix,Gazler/phoenix,Smulligan85/phoenix,mschae/phoenix,ybur-yug/phoenix,dmarkow/phoenix,evax/phoenix,eksperimental/phoenix,vic/phoenix,korobkov/phoenix,0x00evil/phoenix,mitchellhenke/phoenix,phoenixframework/phoenix,evax/phoenix,trarbr/phoenix,ericmj/phoenix,jamilabreu/phoenix,keathley/phoenix,mitchellhenke/phoenix,rodrigues/phoenix