IMGAPI-317: add a portal guide for integrating img mgmt into the portal
IMGAPI-317: add a portal guide for integrating img mgmt into the portal

numericillustration/sdc-imgapi,numericillustration/sdc-imgapi,joyent/sdc-imgapi,numericillustration/sdc-imgapi,joyent/sdc-imgapi,joyent/sdc-imgapi