Create templates for issues and pull requests

.github/ISSUE_TEMPLATE/Bug_report.md

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+## Bug report
+Hello! Thank you for reporting an issue!
+If you would fill out the below points, that would make our process a whole lot easier!
+
+
+* **Please tell us about your environment:** 
+  - Jrnl version: (run `jrnl -v`)
+  - How you installed Jrnl
+	
+  - Operating system [MacOS, Linux, Windows?]
+
+* **What is the current behavior?**
+
+* **Please provide the steps to reproduce and if possible a minimal demo of the problem** 
+
+
+* **What is the expected behavior?**
+
+* **Other information** (e.g. detailed explanation, stacktraces, related issues, suggestions how to fix, links for us to have context, eg. stackoverflow, gitter, etc)
+

.github/ISSUE_TEMPLATE/Feature_request.md

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+#Feature Request
+Hello! Thank you for reporting an issue!
+If you would fill out the below points, that would make our process a whole lot easier!
+
+* **What is the motivation / use case for changing the behavior?**
+
+* **Please provide examples of the usage**
+
+* **Other information** (e.g. detailed explanation, stacktraces, related issues, suggestions how to fix, links for us to have context, eg. stackoverflow, gitter, etc)

.github/ISSUE_TEMPLATE/Support_request.md

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+## Support request
+Hello! Thank you for reporting an issue!
+If you would fill out the below points, that would make our process a whole lot easier!
+
+
+
+* **Please tell us about your environment:**
+
+  - Jrnl version: (run `jrnl -v`)
+  - How you installed Jrnl
+	
+  - Operating system [MacOS, Linux, Windows?]
+
+* **What are you trying to do?**
+
+* **What have you tried?**
+
+* **Other information** (e.g. detailed explanation, stacktraces, related issues, suggestions how to fix, links for us to have context, eg. stackoverflow, gitter, etc)
+