helpful tips for contributors

[JessicaS11]

As more people are starting submit code and examples, it's going to be increasingly important that things are independent and robust as far as links, file paths, etc. I think it would be helpful for newer contributors to have a set of helpful tips on some of these basic tasks that they can refer to. I'll work on getting a list together of some of the items I've encountered so far, but please feel free to post your ideas here. Let me know if you want to take the lead on setting up this document and adding it to the repo.

[JessicaS11]

Update: I would like these resources to include an interactive "how to contribute to icepyx" jupyter notebook that helps with development environment management (e.g. pip install -e.) and other tips and tricks.