docs(META): Contributing guidelines doc

ISSUES CLOSED: #26

Author: Nick Balestra

CONTRIBUTING.md

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+First of all, thank you for contributing. It’s appreciated.
+
+# To submit a pull request
+
+1. Open a GitHub issue before doing significant amount of work.
+2. Clone the repo. If it was already cloned, then git pull to get the latest from master.
+4. Run `npm install`.
+5. Write code.
+6. Run `npm test` to lint and test. Don’t commit before fixing all errors and warnings.
+7. Commit using `npm run commit` and follow the CLI instructions.
+8. Make a pull request.
+
+# To release new versions
+
+1. Check that you have npm publishing rights before anything else.
+2. Run `npm run check-release`.
+3. Run `npm run release`.