Print security groups as a human readable list

Convert the security group list into a list that is more suitable for
printing.

Change-Id: I411d9256145986fad7659a9377494e29a6d70ced
Flatten hypervisor-show dictionary for printing

Flatten the nested dicts so that hypervisor information can be more
easily used at the command line.

Change-Id: I5dfcf9d10f917a63bde09f0b5a691784a5e8f02b
Closes-bug: #1243512
Change "project" to "project_id" in cloudpipe-create

The CLI was stating that the name of the project should be used, but the
parameter needs to be the project_id.

Change-Id: If0908a1b72c526f6436432ff18599423f89f7d1f
Discrepancy between README.rst and nova help

1) --version in README should be --os-compute-api-version

2) NOVA_URL should be OS_AUTH_URL

Change-Id: Ib8989e6923e2073bcc31d2a17d346eb436effdc8
Closes-Bug: 1250842
Merge "Print security groups as a human readable list"
Merge "Flatten hypervisor-show dictionary for printing"
Merge "Change "project" to "project_id" in cloudpipe-create"