Write better instrustions for RDP

[jontyms]

Should show how to install and use an rdp client on Windows Linux and Macos

Show how to setup RDP security group on openstack

[Sollarfun20]

75% done, awaiting mac documentation to finalize.

[Sollarfun20]

Documentation is complete and is awaiting pull request approval and then a merge into main branch.

#40

[Sollarfun20]

Documentation now needs to be pulled into production.

#43

[Sollarfun20]

@jontyms Can be closed now, issue resolved.