Added PULL_REQUEST_TEMPLATE.md

[chriscorcimiglia]

What does this PR do?

Adds the PULL_REQUEST_TEMPLATE.md file and updates the CONTIRBUTING.md file with info about the pull request template. The goal is to make PRs look like this one.

Do you have any concerns with this PR?

No.

How can the reviewer verify this PR?

See the PULL_REQUEST_TEMPLATE.md and CONTIRBUTING.md files.

Any background context you want to provide?

This began as a suggestion from @missbikesalot. Thank you!

Screenshots (if appropriate)

NA

Questions:

• Have you connected this PR to the issue it resolves? Yes.
• Does the documentation need an update? No (this does it).
• Does this add new Python dependencies? No.
• Have you added unit or functional tests for this PR? No.

[chriscorcimiglia]

@RandyLevensalor and @medberry I made the suggested changes and this PR is ready for review again.