Added contribution guidelines, issue template and changelog (since

v2.1.142)

.github/CONTRIBUTING.md

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+You have found an issue? You want to contribute to that project?
+Fine, you're at the right place
+
+# Writing an issue
+You don't have much time? Neither do we.
+
+We would appreciate that you follow the issue template to report a bug. Hopefully, if the bug is well written and can be reproduced easily, it will be fixed quite quickly.
+
+However, this project is maintained by volunteers who work on this project on their spare time. Please be patient and please provide enough info so that we can help you.
+
+We also welcome pull requests.
+
+# Writing a pull request
+- Fork the project
+- Create a branch based on `develop`, like `feature/support-for-xxx`
+- Write your code there
+- Update the changelog
+- create a PR on `develop`, explaining what you've done and how can we test your change
+
+# Writing sample codes or documentation on the wiki
+You are welcome!

.github/ISSUE_TEMPLATE.md

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+I have an issue / a question (pick one) about Vlc.DotNet.
+
+# Generic information
+
+- **Vlc.DotNet version** : (Please fill)
+- **Vlc.DotNet project used** : (WinForms/WPF/Core)
+- **libvlc version** : (Please fill) (x86/x64) + how did you get it?
+- **.net version** : (Please fill)
+- **Project language** : (C#/VB.net)
+- **Project build architecture** : (x86/x64/AnyCPU/AnyCPU (prefer 32bits))
+- **Operating system** : (Windows ...) (x86/x64)
+
+# Summary
+
+(What happens, when, how? Steps to reproduce (with sample codes))
+
+- [ ] I confirm that my issue doesn't happen in VLC itself.

CHANGELOG.md

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+# Unreleased
+
+# 2.1.154
+- Nothing, just a few commits to change README files
+
+# 2.1.151
+- FIXED: Log messages are emitted on another thread to avoid locking VLC #284
+
+# 2.1.149
+- ADDED: Feature to get VLC logs from Vlc.DotNet #278
+
+# 2.1.144
+- Nothing for the library, just a modification for the code examples #277
+
+# 2.1.142
+- FIXED: Library is now AnyCPU! #271