add doc to IaaS configuration
add doc to IaaS configuration

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