Add issue template

I hope you don't mind the emoji

.github/issue_template.md

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+## 🐛 Bug Reports
+
+When reporting a bug, please provide the following information. If this is not a bug report you can just discard this template.
+
+### 🌍 Environment
+
+ - Your operating system and version: 
+ - Your python version:
+ - How did you install python (e.g. apt or pyenv)? Did you use a virtualenv?:
+ - Your rust version:
+ 
+### 💥 Reproducing 
+
+Please provide a [minimal working example](https://stackoverflow.com/help/mcve). This means both the rust code and the python.
+
+Please also write what exact flags are required to reproduce your results.