I finally wrote my first extension. It's a simple one called Long Rest Reminder.
It does two things:
1. If you create a Story entry named LRR it will pop it up on the DM screen when the party takes a long rest. That way you can jot down reminders for when PCs take a Long Rest. Things like consume rations, pay living expenses, roll for charges on items, make saving throws to recover from diseases, curses, etc. Things like that.
2. It adds two slash commands /longrestLRR and /shortrestLRR so you can apply rests from the hotbar rather than go through the combat tracker.
Known issue: The text displayed in the chat window when using the slash commands doesn't match what would be displayed if you used the combat tracker. I'll get around to fixing that at a later date.
Hopefully someone finds this useful. I know I will. And if you have any problems or minor suggestions, let me know.
Note: I know just enough about programming to be dangerous. So I'm sure my code is sloppy and ugly. Feel free to offer suggestions to tighten it up. Also, any feature addition suggestions will have to be very minor, or something that I really like. Because for me to implement anything means a lot of research how to do it.