add contributiong guidelines

Author: skywinder

CONTRIBUTING.md

@@ -0,0 +1,33 @@
+# Contributing to TON Research
+
+Thanks for taking the time to contribute!
+
+The following is a set of guidelines for contributing to TON Research.
+
+## Submitting Issues
+
+- Include the version of TOM and the Operating System you are using.
+- Include reproducing steps, screenshots or animated GIFs whenever possible; they are immensely helpful.
+
+## Pull Requests
+
+Issues and features are recorded in [Issues](https://github.com/copperbits/TON/issues). If your issues or wanted features are not listed, feel free to raise them for discussions.
+
+### Issues/Features
+
+- Issues are tagged with [bug](https://github.com/copperbits/TON/labels/bug). Issues always higher priority to solve.
+- Features are tagged with [enhancement](https://github.com/copperbits/TON/labels/enhancement).
+
+[Milestones](https://github.com/copperbits/TON/milestones) are used to group tasks that trying to be solved, based on preceived importance/difficulties.
+
+### Submit Changes
+
+- Fork https://github.com/copperbits/TON to your GitHub repository.
+- Clone the repo to your local computer.
+
+### Submit a new Pull Request
+
+- Start a new branch `git checkout -b branch-name`.
+- Commit your changes, with a few unit tests whenever possible.
+- Push your branch `git push -u origin branch-name` to GitHub.
+- Submit a Pull Request through GitHub with a clear description on what's the change about.