Change read/writethedocs.org URLs to https

Didn't change others at this time; sphinx-doc.org for instance doesn't yet support https

docs/getting_started.rst

@@ -144,8 +144,8 @@ If you have any more trouble, don't hesitate to reach out to us. The :doc:`suppo
 .. _install Sphinx: http://sphinx-doc.org/latest/install.html
 .. _install Mkdocs: http://www.mkdocs.org/#installation
 .. _reStructuredText: http://sphinx-doc.org/rest.html
-.. _this template: http://www.writethedocs.org/guide/writing/beginners-guide-to-docs/#id1
-.. _Sign up: http://readthedocs.org/accounts/signup
-.. _log in: http://readthedocs.org/accounts/login
-.. _dashboard: http://readthedocs.org/dashboard
-.. _Import: http://readthedocs.org/dashboard/import
+.. _this template: https://www.writethedocs.org/guide/writing/beginners-guide-to-docs/#id1
+.. _Sign up: https://readthedocs.org/accounts/signup
+.. _log in: https://readthedocs.org/accounts/login
+.. _dashboard: https://readthedocs.org/dashboard
+.. _Import: https://readthedocs.org/dashboard/import