To Do utility

This utility creates a to-do list to assist the player in what he needs to do to have a minimally crafted fortress.

The tasks in the list are based on the existing flowchart in the game wiki:

https://dwarffortresswiki.org/images/e/e6/FlowchartDF.png

Each task is dependent on a predecessor following the flowchart. Tasks will appear in the list during use.

It's very intuitive (I guess). So there is no manual to explain how to use it.

The source code is attached together.

Enjoy!