*: add changelog and github templates (#143)

Signed-off-by: Neil Shen <overvenus@gmail.com>

.github/ISSUE_TEMPLATE/bug-report.md

@@ -0,0 +1,29 @@
+---
+name: "🐛 Bug Report"
+about: Something isn't working as expected
+title: ''
+labels: 'bug'
+---
+
+Please answer these questions before submitting your issue. Thanks!
+
+1. What did you do?
+If possible, provide a recipe for reproducing the error.
+
+
+2. What did you expect to see?
+
+
+
+3. What did you see instead?
+
+
+
+4. What version of BR and TiDB/TiKV/PD are you using?
+
+<!--
+br -V
+tidb-server -V
+tikv-server -V
+pd-server -V
+-->

.github/ISSUE_TEMPLATE/feature-request.md

@@ -0,0 +1,19 @@
+---
+name: "🚀 Feature Request"
+about: I have a suggestion
+labels: enhancement
+---
+
+## Feature Request
+
+### Describe your feature request related problem:
+<!-- A description of what the problem is. -->
+
+### Describe the feature you'd like:
+<!-- A description of what you want to happen. -->
+
+### Describe alternatives you've considered:
+<!-- A description of any alternative solutions or features you've considered. -->
+
+### Teachability, Documentation, Adoption, Migration Strategy:
+<!-- If you can, explain some scenarios how users might use this, or situations in which it would be helpful. Any API designs, mockups, or diagrams are also helpful. -->

.github/pull_request_template.md

@@ -0,0 +1,37 @@
+<!--
+Thank you for working on BR! Please read BR's [CONTRIBUTING](https://github.com/pingcap/br/blob/master/CONTRIBUTING.md) document **BEFORE** filing this PR.
+-->
+
+### What problem does this PR solve? <!--add issue link with summary if exists-->
+
+
+### What is changed and how it works?
+
+
+### Check List <!--REMOVE the items that are not applicable-->
+
+Tests <!-- At least one of them must be included. -->
+
+ - Unit test
+ - Integration test
+ - Manual test (add detailed scripts or steps below)
+ - No code
+
+Code changes
+
+ - Has exported function/method change
+ - Has exported variable/fields change
+ - Has interface methods change
+ - Has persistent data change
+
+Side effects
+
+ - Possible performance regression
+ - Increased code complexity
+ - Breaking backward compatibility
+
+Related changes
+
+ - Need to cherry-pick to the release branch
+ - Need to update the documentation
+ - Need to be included in the release note

CHANGELOG.md

@@ -0,0 +1,18 @@
+# BR (Backup and Restore) Change Log
+All notable changes to this project are documented in this file.
+See also,
+- [TiDB Changelog](https://github.com/pingcap/tidb/blob/master/CHANGELOG.md),
+- [TiKV Changelog](https://github.com/tikv/tikv/blob/master/CHANGELOG.md),
+- [PD Changelog](https://github.com/pingcap/pd/blob/master/CHANGELOG.md).
+
+## [3.1.0-beta.1] - 2020-01-10
+
+- Fix the inaccurate backup progress information [#127](https://github.com/pingcap/br/pull/127)
+- Improve the performance of splitting Regions [#122](https://github.com/pingcap/br/pull/122)
+- Add the backup and restore feature for partitioned tables [#137](https://github.com/pingcap/br/pull/137)
+- Add the feature of automatically scheduling PD schedulers [#123](https://github.com/pingcap/br/pull/123)
+- Fix the issue that data is overwritten after non `PKIsHandle` tables are restored [#139](https://github.com/pingcap/br/pull/139)
+
+## [3.1.0-beta] - 2019-12-20
+
+Initial release of the distributed backup and restore tool