Github contribution templates

.gitattributes

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+# Ignore files for distribution archives.
+
+.editorconfig             export-ignore
+.gitattributes            export-ignore
+.gitignore                export-ignore
+.travis.yml               export-ignore
+.github                   export-ignore
+
+CONTRIBUTING.md           export-ignore

.github/ISSUE_TEMPLATE.md

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+## Problem/Motivation
+
+> (Why the issue was filed)
+
+## Expected behaviour
+
+> (What you expected to happen)
+
+## Actual behaviour
+
+> (What actually happened)
+
+## Steps to reproduce
+
+> (How can someone else make/see it happen)
+
+## Proposed changes
+
+> (If you have a proposed change, workaround or fix, describe the rationale behind it)

.github/PULL_REQUEST_TEMPLATE.md

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+## Proposed Changes
+
+> (Describe the changes and rationale behind them)
+
+## Related Issues
+
+> ([Github link](https://help.github.com/articles/autolinked-references-and-urls/) to related issues or pull requests)