Add Contributing Guide

[lrljoe]

Add start of Contributing Guide

All Submissions:

• [ ] Have you followed the guidelines in our Contributing document?
• [ ] Have you checked to ensure there aren't other open Pull Requests for the same update/change?

New Feature Submissions:

1. [ ] Does your submission pass tests and did you add any new tests needed for your feature?
2. [ ] Did you update all templates (if applicable)?
3. [ ] Did you add the relevant documentation (if applicable)?
4. [ ] Did you test locally to make sure your feature works as intended?

Changes to Core Features:

• [ ] Have you added an explanation of what your changes do and why you'd like us to include them?
• [ ] Have you written new tests for your core changes, as applicable?
• [ ] Have you successfully ran tests with your changes locally?

[codecov[bot]]

Codecov Report

Merging #1540 (52f7352) into develop (435f5c4) will not change coverage. The diff coverage is n/a.

@@            Coverage Diff             @@
##             develop    #1540   +/-   ##
==========================================
  Coverage      88.98%   88.98%           
  Complexity      1264     1264           
==========================================
  Files             96       96           
  Lines           2997     2997           
==========================================
  Hits            2667     2667           
  Misses           330      330