Changes to HP contributors titles.

We would like our introductions to be neutral and simply reflect our work affiliations, I've changed the lines for Ben deBont and Robert Clark accordingly. (I'm Rob Clark).

Change-Id: I1e8ca99b2a7f27db20e363164b665f13997fa4bc
Bug # 1130868 - Updated package-based client installation steps.

- Added instructions regarding the use of RHEL packages.
- Corrected prompts in a number of places where root was assumed but
  "normal" prompt was displayed.
- Switched programlisting elements to screen because:
  * It's semantically correct, these aren't scripts.
  * The inclusion of the prompt character throws off the color syntax
    highlighter due to the presence of the prompt character (# being the
    comment character and $ the variable marker in bash).
- Made it clearer in package-based installation steps that there are
  clients other than nova available.
- Added a note to highlight that it's not necessary to install the
  clients using pip if you already used the distribution packages. In
  future probaly require two procedures rather than having distribution
  packages strewn throughout the prerequisites.

Change-Id: I7a1d041d92b9c74a860def6a15bc10e6c46cf589
Fixes: bug 1130868
Merge "Bug # 1130868 - Updated package-based client installation steps."
Merge "Changes to HP contributors titles."