Update Readme.md
Update Readme.md

Include link to Openmano descriptors

nfvlabs/openmano,me-ankur/openmano,312v/openmano,me-ankur/openmano,nfvlabs/openmano,me-ankur/openmano,me-ankur/openmano,312v/openmano,312v/openmano,me-ankur/openmano,nfvlabs/openmano,nfvlabs/openmano,312v/openmano,312v/openmano,nfvlabs/openmano