added instructions for getting started with Eclipse
added instructions for getting started with Eclipse

Signed-off-by: Rob Sherwood <44f7bfdf3cd406e109c687c7bcda497ad23b614d@bigswitch.com>

mandeepdhami/netvirt-ctrl,opendaylight/archived-net-virt-platform,opendaylight/archived-net-virt-platform,opendaylight/archived-net-virt-platform,mandeepdhami/netvirt-ctrl,mandeepdhami/netvirt-ctrl,mandeepdhami/netvirt-ctrl,mandeepdhami/netvirt-ctrl,opendaylight/archived-net-virt-platform