Add note about rubybvc.
Add note about rubybvc.

gaberger/pybvc,jebpublic/pybvc,brocade/pysdn,tnadeau/pybvc,brocade/pysdn,brocade/pybvc,tnadeau/pybvc,gaberger/pybvc,jebpublic/pybvc,s-garbuzov/pybvc,s-garbuzov/pybvc,brocade/pybvc-archive-DO-NOT-USE