docs: added release notes for tsuru 0.9.0.
docs: added release notes for tsuru 0.9.0.

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