PULL_REQUEST_TEMPLATE.md

Checklist:

• My pull request doesn't just contain spelling corrections.
• My pull request doesn't interrupt the flow of the average user.
• My pull request is relevent to Mass DMing.
• I have explained how my pull request will improve the program.

(replace the spaces with an x to tick it)

Changes made:

(explain what changes you have made to DMDGO)

Why I've done these changes:

(how does this improve DMDGO)