Update issue templates

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,24 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Example data
+2. simple programm snippet
+3. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**System**
+ - Java version
+ - Version [e.g. 22]