Create CONTRIBUTING.md

Author: shyim

CONTRIBUTING.md

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+# Contribution Guidelines
+
+- Use a meaningful name to your commit or I'll close it instantly
+
+Ensure your pull request adheres to the following guidelines:
+
+- Search previous suggestions before making a new one, as yours may be a duplicate.
+- Suggested packages should be tested and documented.
+- The pull request should have a meaningful title and include a link to the package / resource and why it's awesome.
+- Make an individual pull request for each suggestion.
+- Use the following format: `[resource](link) - Description by [Author](link to author)`
+- Use [title-casing](http://titlecapitalization.com) (AP style).
+- Additions should be added to the bottom of the relevant category.
+- New categories, or improvements to the existing categorization are welcome.
+- Keep descriptions short and simple, but descriptive.
+- Don't mention `Quantified Self` in the description as it's implied.
+- Start the description with a capital.
+- Check your spelling and grammar.
+- Make sure your text editor is set to remove trailing whitespace.
+
+Thank you for your suggestions!