docs: added vagrant document on index.
docs: added vagrant document on index.

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