queue: improve docs for Handler
queue: improve docs for Handler

ggarnier/tsuru,4eek/tsuru,guilhermebr/tsuru,gwmoura/tsuru,jblancett/tsuru,kgrvamsi/tsuru,cgvarela/tsuru,gwmoura/tsuru,Endika/tsuru,RichardKnop/tsuru,Endika/tsuru,jblancett/tsuru,tsuru/tsuru,tsuru/tsuru,hcxiong/tsuru,mderaldo/tsuru,4eek/tsuru,ArxdSilva/tsuru,gwmoura/tsuru,cezarsa/tsuru,cgvarela/tsuru,tuxmonteiro/tsuru,firebitsbr/tsuru,RichardKnop/tsuru,hugoantunes/tsuru,cezarsa/tsuru,ArxdSilva/tsuru,mderaldo/tsuru,guilhermebr/tsuru,4eek/tsuru,hugoantunes/tsuru,gciotta/tsuru,cgvarela/tsuru,tsuru/tsuru,ArxdSilva/tsuru,ggarnier/tsuru,guilhermebr/tsuru,kgrvamsi/tsuru,Endika/tsuru,hcxiong/tsuru,RichardKnop/tsuru,cezarsa/tsuru,tuxmonteiro/tsuru,hcxiong/tsuru,guilhermebr/tsuru,ggarnier/tsuru,cezarsa/tsuru,jblancett/tsuru,mderaldo/tsuru,tuxmonteiro/tsuru,firebitsbr/tsuru,gciotta/tsuru,ArxdSilva/tsuru,tsuru/tsuru,gciotta/tsuru,ggarnier/tsuru,kgrvamsi/tsuru,firebitsbr/tsuru