Add issue and pull request templates (#353)

* added issue pr templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug Report
+about: Create a report to help us improve
+
+---
+## Describe the bug
+<!--- A clear and concise description of what the bug is. --->
+
+## Steps to reproduce the bug
+<!--- Help us fix this bug is by providing steps to reproduce! -->
+
+
+## Expected behavior
+<!--- A clear and concise description of what you expected to happen. --->
+
+## Screenshots
+<!--- If applicable, add screenshots to help explain your problem. --->
+
+## Environment
+<!--- Include specific details about the environment the issue occurred in. --->
+- OS: [e.g. iOS]
+- Browser [e.g. chrome, safari]
+- Version [e.g. 22]
+
+## 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 to improve this project!
+
+---
+<!--- Delete where not applicable --->
+## Is your feature request related to a problem? Please describe.
+<!--- 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. -->

.github/ISSUE_TEMPLATE/replay_issue.md

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+---
+name: Replay Issue
+about: Can not replay a specific web page? Tell us about it!
+
+---
+## Expected behavior
+<!--- Tell us about the page and how it should replay -->
+
+
+## What actually happened
+<!--- Tell us about how we failed to replay the page -->
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+
+## Browser
+<!--- Tell us about the browser you used to view the page. -->
+<!--- Choose either desktop or smartphone. -->
+**Desktop (please complete the following information):**
+- OS: [e.g. iOS]
+- Browser [e.g. chrome, safari]
+- Version [e.g. 22]
+
+**Smartphone (please complete the following information):**
+- Device: [e.g. iPhone6]
+- OS: [e.g. iOS8.1]
+- Browser [e.g. stock browser, safari]
+- Version [e.g. 22]

.github/PULL_REQUEST_TEMPLATE.md

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+<!--- Provide a general summary of your changes in the Title above -->
+<!--- Delete where not applicable --->
+
+## Description
+<!--- Describe your changes in detail -->
+
+## Motivation and Context
+<!--- Why is this change required? What problem does it solve? -->
+<!--- If it fixes an open issue, please link to the issue here. -->
+<!--- Include Any URLs requiring this change. -->
+
+## Screenshots (if appropriate):
+
+## Types of changes
+<!--- What types of changes does your code introduce? Put an `x` in all the boxes that apply: -->
+- [ ] Replay fix (fixes a replay specific issue)
+- [ ] Bug fix (non-breaking change which fixes an issue)
+- [ ] New feature (non-breaking change which adds functionality)
+- [ ] Breaking change (fix or feature that would cause existing functionality to change)
+
+## Checklist:
+<!--- Go over all the following points, and put an `x` in all the boxes that apply. -->
+<!--- If you're unsure about any of these, don't hesitate to ask. We're here to help! -->
+- [ ] My change requires a change to the documentation.
+- [ ] I have updated the documentation accordingly.
+- [ ] I have added or updated tests to cover my changes.
+- [ ] All new and existing tests passed.