Choose consistent case for CIP4 URLs

These URLs (either www.cip4.org or www.CIP4.org) are used in a number of places:

1. The web site itself - lower case
2. Within the body of the document, essentially as text - mixed.
   Easy to change mostly upper but lets move on...
3. As enumerations: Obviously the case is fixed so changing would be an issue.
   Examples:
   1. (X)JDF/@xmlns  -  upper case.
   2. (X)JMF/@xmlns - upper case.
   3. PreflightParams/../BasicPreflightTest/@DevNS - upper case.
   4. DevCaps/@DevNS - upper case.
   5. DevCap/@DevNS - upper case.
   6. Device Capabilities State/@DevNS - upper case
4. In the appendix - particularly the references to other cip4 documents - lower case
5. In all the examples - upper case.

Going for UC: no change to enumerations or examples easy fix to body text. But website is 'wrong'.

Going for LC: change to enumerations, examples and body text. Wesite ok