Add Github issue template.

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,25 @@
+<!-- 
+
+Thank you for taking the time to report an ODK Briefcase issue!
+
+This space is for submitting problems and feature requests. For general usage or form design questions, please email [email protected] or for ODK Briefcase source code questions, please email [email protected]
+
+Before filling this form, visit https://github.com/opendatakit/briefcase/issues and search to see whether your issue was already reported or fixed. If you find a match, comment on it or add a +1 rather than posting a new issue. If you find a problem you know how to fix, submit a pull request. 🎉
+
+For all problem reports, please use the template below. Also include any relevant stack traces or error messages.
+
+For feature requests, please include the problem description (what problem do you have that can't currently be solved?) and a proposed solution if you have one in mind (optional). You can delete the template. 
+
+-->
+
+#### Software versions 
+ODK Briefcase v1.x.x, Java v1.x.x, operating system, Aggregate v1.x.x...
+
+#### Problem description
+
+#### Steps to reproduce the problem
+
+#### Expected behavior
+
+#### Other information 
+Things you tried, stack traces, related issues, suggestions on how to fix it...