message: Update CONTRIBUTING.md
  Added more content
diff: -* Thank you for choosing to contribute to DataFrame *
  +# Thank you for choosing to contribute to DataFrame
  +
  +### Did you find a bug
  +* Ensure the bug was not already reported by searching on GitHub under Issues.
  +* If you're unable to find an open issue, mark it as **bug**, addressing the problem, open a new one. Be sure to include a title and clear description, as much relevant information as possible, and a code sample or an executable test case demonstrating the expected behavior that is not occurring.
  +* If you wrote a patch that fixes a bug
  + * Open a new GitHub pull request with the patch.
  + * Ensure the PR description clearly describes the problem and solution. Include the relevant issue number if applicable.
  + * Follow the same coding conventions and formatting already in DataFrame, as much as you can
  +
  +### Do you intend to add a new feature or change an existing one?
  +* Open an issue and mark it as **new feature** and clearly describe the new feature/enhancement.
  +* Wait a few days for feedback.
  +* Open a branch and implement your new addition/enhancement.
  +* write an **explicit and omprehensive** test for your new addition/enhancement.
  +* issue a pull request
  