add PULL_REQUEST_TEMPLATE

.github/pull_request_template.md

@@ -0,0 +1,58 @@
+<!--
+Thanks for submitting a change to ownCloud!
+
+This is the bug tracker for the OCIS component. Find other components at https://github.com/owncloud/core/blob/master/.github/CONTRIBUTING.md#guidelines
+
+For fixing potential security issues please see https://owncloud.org/security/
+
+To make it possible for us to get your change reviewed and merged please carefully fill out the requested information below.
+
+Please note that any kind of change needs first be submitted to the master branch which holds the next version of ownCloud.
+
+Please set the following labels:
+
+- Set label "Status:Needs-Review" for review or "Status:In-Progress" if the PR still has open tasks.
+- Assignment: assign to self
+- Reviewers: pick at least one
+-->
+
+## 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: -->
+- Fixes <issue_link>
+
+## Motivation and Context
+<!--- Why is this change required? What problem does it solve? -->
+
+## 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. -->
+- test environment:
+- test case 1:
+- test case 2:
+- ...
+
+## Screenshots (if appropriate):
+
+## Types of changes
+<!--- What types of changes does your code introduce? Put an `x` in all the boxes that apply: -->
+- [ ] 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)
+- [ ] Technical debt
+- [ ] Tests only (no source changes)
+
+## Checklist:
+<!-- Tick the checkboxes when done. -->
+<!-- Raise documentation ticket in owncloud.github.io/ -->
+- [ ] Code changes
+- [ ] Unit tests added
+- [ ] Acceptance tests added
+- [ ] Documentation ticket raised: <link> 
+