This change updates the stale README and makes it the landing page of
our new documentation. This change also makes several formatting changes
to make our documentation fit the new docs.airshipit.org framework.
Lastly, some items from the original README have been updated for
accuracy and moved to a separate page of the documentation.
Change-Id: Iae898b36034640df4d35a430eb28fbda028f10dd
Signed-off-by: Drew Walters <andrew.walters@att.com>
