Create pull_request_template.md

.github/pull_request_template.md

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+All Submissions:
+
+* [ ] Have you followed the guidelines in our Contributing document?
+* [ ] Have you checked to ensure there aren't other open [Pull Requests](../../../pulls) for the same update/change?
+
+<!-- You can erase any parts of this template not applicable to your Pull Request. -->
+
+## Description
+<!-- Describe your changes in detail -->
+
+## Related Issue
+<!-- This project only accepts pull requests related to open issues -->
+<!-- If suggesting a new feature or change, please discuss it in an issue first -->
+<!-- If fixing a bug, there should be an issue describing it with steps to reproduce -->
+<!-- Please link to the issue here: -->
+
+## 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. -->
+
+## How Has This Been Tested?
+<!-- Please describe in detail how you tested your changes. -->
+<!-- Include details of your testing environment, and the tests you ran to -->
+<!-- see how your change affects other areas of the code, etc. -->
+
+## Screenshots (if appropriate):