Merge pull request #4053 from Microsoft/mrtk_release

Update mrtk_dev with mrtk_release

.github/ISSUE_TEMPLATE/bug-report.md

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+---
+name: Bug report
+about: Create a bug report to help us improve
+title: ''
+labels: Bug
+assignees: ''
+
+---
+
+## Describe the bug
+
+A clear and concise description of what the bug is.
+
+## To reproduce
+
+Steps to reproduce the behavior:
+
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+## Expected behavior
+
+A clear and concise description of what you expected to happen.
+
+## Screenshots
+
+If applicable, add screenshots to help explain your problem.
+
+## Your Setup (please complete the following information)
+
+- Unity Version [e.g. 2018.3.11f1]
+- MRTK Version [e.g. v2.0]
+
+## Target Platform (please complete the following information)
+
+- HoloLens
+- HoloLens 2
+- WMR immersive
+- OpenVR
+
+## Additional context
+
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/documentation-issue.md

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+---
+name: Documentation Issue
+about: 'Something in our doc is missing or incorrect '
+title: ''
+labels: Documentation
+assignees: ''
+
+---
+
+## Describe the Issue
+A clear and concise what the issue
+
+## Feature Area
+What's incorrect? What's missing?
+
+## Existing Doc Link
+If this is about something in an existing document, please provide link 
+
+## Additional context
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature-request.md

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+---
+name: Feature Request
+about: Suggest an idea for the MRTK
+title: ''
+labels: Feature Request
+assignees: ''
+
+---
+
+## Describe the problem
+
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+## Describe the solution you'd like
+
+A clear and concise description of what you want to happen.
+
+## Describe alternatives you've considered
+
+A clear and concise description of any alternative solutions or features you've considered.
+
+## Additional context
+
+Add any other context or screenshots about the feature request here.