Add basic tempest run instructions to the quickstart

This commit adds details for using tempest run to execute tempest tests
to the quickstart guide in the readme.

Partially-implements: bp tempest-run-cmd

Change-Id: I7c5b51e4f055424fa62b1b262b2d1c96918e46eb
diff --git a/README.rst b/README.rst
index 725a890..28ff368 100644
--- a/README.rst
+++ b/README.rst
@@ -91,8 +91,18 @@
    any changes to it otherwise Tempest will not know how to load it.
 
 #. Once the configuration is done you're now ready to run Tempest. This can
-   be done with testr directly or any `testr`_ based test runner, like
-   `ostestr`_. For example, from the working dir running::
+   be done using the :ref:`tempest_run` command. This can be done by either
+   cd'ing into the tempest workspace directory and running::
+
+     $ tempest run
+
+   Or use the ``--workspace`` argument to run in the workspace you created
+   regarless of your current working directory. For example::
+
+     $ tempest run --workspace cloud-01
+
+   There is also the option to use testr directly, or any `testr`_ based test
+   runner, like `ostestr`_. For example, from the working dir running::
 
      $ ostestr --regex '(?!.*\[.*\bslow\b.*\])(^tempest\.(api|scenario))'
 
diff --git a/doc/source/run.rst b/doc/source/run.rst
index 07fa5f7..ce7f03e 100644
--- a/doc/source/run.rst
+++ b/doc/source/run.rst
@@ -1,3 +1,5 @@
+.. _tempest_run:
+
 -----------
 Tempest Run
 -----------