Include a readme explaining the module's purpose

Thanks Geoff!

README.md

@@ -0,0 +1,8 @@
+modules/dist/bitbucket-org
+==========================
+
+This is a puppet module that install the Bitbucket host key into the system
+known hosts file (typically /etc/ssh/ssh_known_hosts).  Including the
+bitbucket-org class from this module in a puppet node will allow git activity
+on the node to proceed without ever having to answer whether to trust the host
+key while maintaining secure authentication of the bitbucket server.