Fixed Readme to incorporate changes made in go-cli
Fixed Readme to incorporate changes made in go-cli

go-cli commands in non-interactive mode do not print the count of ouput that would follow
now.
go-cli commands "project show" and "tenant show" changed to "project get" and
"tenant get" respectively to get the current project or tenant in config file.

Change-Id: I73d9e7a6a15a54544d200fdf89ac882cde56f246

vmware/photon-controller-cli,vmware/photon-controller-cli