Contributing instructions page

[Eddayavuz]

Issue

143

Changes Proposed

1. Created a CONTRIBUTING.md file with instructions for contributing, in vuepress formatting.
2. Added a section to the README.markdown file to link to the contributing instructions

Testing Instructions

Please test by clicking on the link "contributing instructions" at the end of readme.md

Extra Information

Should I delete the Author section?

Share with Us!

This is my first contribution! Super excited.

[Eddayavuz]

Thank you for reviewing @jlooper , I appreciate your time! I've made the necessary changes.