Print list of pre-requisites, prompt to continue
Print list of pre-requisites, prompt to continue

In an effort to clarify command-line documentation, introduce a
(relatively) short blurb describing the pre-requisites for running
the deployment script. Also add a flag that allows users to skip
it. :)

Signed-off-by: Jose A. Rivera <2a0958b6fecb909a38a254361e8d9708c4487d67@redhat.com>

gluster/gluster-kubernetes,ramkrsna/gluster-kubernetes,gluster/gluster-kubernetes,ramkrsna/gluster-kubernetes