Add templates for PR and bug reports.

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+
+---
+
+### Subject of the issue
+Describe your issue here.
+
+### Your environment
+* OS - 
+* Version - 
+
+### Steps to reproduce
+Tell us how to reproduce this issue. Please provide a working demo, you can use [this template](https://plnkr.co/edit/XorWgI?p=preview) as a base.
+
+### Expected behaviour
+Tell us what should happen
+
+### Actual behaviour
+Tell us what happens instead
+
+### Additional context
+Add any other context about the problem here.

.github/PULL_REQUEST_TEMPLATE

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+### Description
+Please describe your pull request.
+
+💔Thank you!