Readme updates (#222)
Readme updates (#222)

* Update README.md

* Update README.md

Reorganized readme contents, added list of existing tests, moved the e2e primer to the bottom since its an impl detail that some folks (i.e. who have a working e2e.test binary) don't need.  also added notes about normal conformance tools like sonobuoy and so on and how they relate / dont relate to this repo

* Update README.md

* Update README.md

* Update README.md

* Update README.md

* Update README.md

Co-authored-by: James Sturtevant <a56ea4a2acbc94b06b30a2ea48aeadce99810486@gmail.com>

* Update README.md

Co-authored-by: James Sturtevant <a56ea4a2acbc94b06b30a2ea48aeadce99810486@gmail.com>

* Update README.md

Co-authored-by: Mark Rossetti <5be19b547f9b46437ffcdca7170f785f98821354@microsoft.com>

* Update README.md

* Update README.md

* Update README.md

Co-authored-by: James Sturtevant <a56ea4a2acbc94b06b30a2ea48aeadce99810486@gmail.com>
Co-authored-by: Mark Rossetti <5be19b547f9b46437ffcdca7170f785f98821354@microsoft.com>
kubernetes-sigs/windows-testing,kubernetes-sigs/windows-testing