Add bug report template

Author: kavanase

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,18 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: bug
+assignees: ''
+
+---
+
+**Describe the bug**
+Please provide a clear and concise description of what the bug is.
+
+**How and where it happens**
+- Please describe how and where the bug occurs, preferably with screenshots to help.
+- If possible, please provide the code and inputs you are using which causes this bug, so the developers can debug.
+
+**OS**
+Are you using Windows?