Update issue templates

Author: darkl

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,27 @@
+---
+name: Bug report
+about: Create a report to help us improve
+labels: 
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Add a complete standalone code that reproduces the issue. Preferably upload it as a Gist to [GitHub Gist](https://gist.github.com/). Examples [#1](https://gist.github.com/darkl/8546e3abfce64f43b635574e9708e7f0), [#2](https://gist.github.com/darkl/7db5cb48e235bf5b08fa17723aa61677), [#3](https://gist.github.com/esso23/f04702909ac40799075b5221b406b009), [#4](https://gist.github.com/BramVader/864655dc8edb087bb015e143cc6589cb).
+
+Additionally, what steps should be done in order to reproduce the issue. For example:
+>1. Run crossbario router.
+>2. Run Callee.cs
+>3. Run Caller.cs
+>4. Kill crossbario router.
+>5. Run crossbario router again.
+>6. Run Caller.cs again.`
+
+**Expected behavior**
+A clear and concise description of what you expected to happen. For example:
+>Expected: Caller.cs CalleeProxy call should succeed, but it fails.
+
+**Additional context**
+Add any other context about the problem here.