Add a bug report template

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,27 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Quick Summary**
+The TL;DR of what went wrong.  eg. "exception thrown parsing ics file"
+
+**Context**
+- vObject version
+- Python version
+- Operating system and version
+
+**Description**
+A clear, concise, and detailed description of the issue.
+
+**To Reproduce**
+A description of how to reproduce the issue, ideally including
+- a short Python script that demonstrates the problem
+- the iCalendar / vCard that triggers the issue
+
+**Further Notes**
+Anything else useful