router: adding AddBackend and RemoveBackend methods to router interface
router: adding AddBackend and RemoveBackend methods to router interface

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