Convert README to reStructuredText

Change-Id: Iceb9049640aa3e0ff5c030fa5b93225e1e8ff887
Signed-off-by: Paul Belanger <paul.belanger@polybeacon.com>
Reviewed-on: https://review.openstack.org/26381
Reviewed-by: James E. Blair <corvus@inaugust.com>
Approved: Monty Taylor <mordred@inaugust.com>
Reviewed-by: Monty Taylor <mordred@inaugust.com>
Tested-by: Jenkins
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+Zuul
+====
+
+Zuul is a trunk gating system developed for the OpenStack Project.
+
+Contributing
+------------
+
+To get the latest code, see: https://github.com/openstack-infra/zuul
+
+Bugs are handled at: https://launchpad.net/zuul
+
+Code reviews are, as you might expect, handled by gerrit. The gerrit they
+use is http://review.openstack.org
+
+Use `git review` to submit patches (after creating a gerrit account that links to your launchpad account). Example::
+
+    # Do your commits
+    $ git review
+    # Enter your username if promped