Add autosplitter for Windswept

[jamespicone]

Adds an autosplitter for https://store.steampowered.com/app/1660960/Windswept/ . Windswept is conventionally timed with IGT; this ASL script can produce IGT from the in-game timer and also pause the timer when it's paused in game. It can also automatically split when a level is completed.

If you are adding or modifying an Auto Splitter, please fill out this checklist:

• My Auto Splitter does not contain any malicious functionality and I'm entirely responsible for any damages myself. (Any kind of abuse in an Auto Splitter will result in an immediate ban.)
• I am not replacing an existing Auto Splitter by a different author, or I have received permission from the author to replace the existing Auto Splitter.
• The Auto Splitter has an open source license that allows anyone to fork and host it.