General Updates

Change the Cache8 sceenshot to remove a large whitespace

Change the name of the ConfiguringTestEnvironment to be more relevant to
the content.

Change the order of the TOCtree to separate the steps that are relevant to
the VistA-FOIA from those that are only relevant to the
OSEHRA-Automated-Testing

Remove references to Wiki pages from the ObtainingTestingCode.rst

Add link to easy_setup installation page in the README.rst