Fixed pyca#3520 -- added a github issue template for bugs (pyca#3807)

* Fixed pyca#3520 -- added a github issue template for bugs

* grammar

* empty commit to retrigger jenkins

.github/ISSUE_TEMPLATE.rst

@@ -0,0 +1,14 @@
+If you're filing a bug (as opposed to a feature request), please try the
+following things:
+
+* Upgrade to the latest version of ``setuptools`` and ``pip``
+* Make sure you're on a supported version of OpenSSL
+* Try with the latest version of ``cryptography``
+
+If none of that works, please make sure to include the following information in
+your bug report:
+
+* Versions of Python, ``cryptography``, ``cffi``, ``pip``, and ``setuptools``
+  you're using
+* How you installed ``cryptography``
+* Clear steps for reproducing your bug