Stormpath + Okta Readme Update

README.rst

@@ -1,3 +1,11 @@
+==========================
+Stormpath is Joining Okta
+==========================
+
+We are incredibly excited to announce that `Stormpath is joining forces with Okta <https://stormpath.com/blog/stormpaths-new-path?utm_source=github&utm_medium=readme&utm-campaign=okta-announcement>`_. Please visit `the Migration FAQs <https://stormpath.com/oktaplusstormpath?utm_source=github&utm_medium=readme&utm-campaign=okta-announcement>`_ for a detailed look at what this means for Stormpath users.
+
+We're available to answer all questions at `support@stormpath.com <mailto:support@stormpath.com>`_.
+
 django-stormpath
 ================