add explanation about the macro @
add explanation about the macro @

gjaldon/phoenix,pap/phoenix,nshafer/phoenix,phoenixframework/phoenix,phoenixframework/phoenix,wsmoak/phoenix_guides,nshafer/phoenix,0x00evil/phoenix,bsmr-erlang/phoenix,eksperimental/phoenix,bsmr-erlang/phoenix,trarbr/phoenix,optikfluffel/phoenix,mobileoverlord/phoenix,0x00evil/phoenix,michalmuskala/phoenix,rafbgarcia/phoenix,trarbr/phoenix,bratsche/phoenix_guides,jwarwick/phoenix,Kosmas/phoenix,Gazler/phoenix,rafbgarcia/phoenix,eksperimental/phoenix,Gazler/phoenix,michalmuskala/phoenix,optikfluffel/phoenix,jwarwick/phoenix,dmarkow/phoenix,Kosmas/phoenix,evax/phoenix,evax/phoenix,0x00evil/phoenix,rafbgarcia/phoenix,stevedomin/phoenix,gjaldon/phoenix,mitchellhenke/phoenix,pap/phoenix,keathley/phoenix,mitchellhenke/phoenix,korobkov/phoenix,optikfluffel/phoenix,mschae/phoenix,phoenixframework/phoenix,mobileoverlord/phoenix,nshafer/phoenix,Joe-noh/phoenix,keathley/phoenix,dmarkow/phoenix,stevedomin/phoenix,korobkov/phoenix,mschae/phoenix,Joe-noh/phoenix