Kittens & QOL updates v0.1.5

We now have kittens !

Several bug fixes and QOL updates.

Too lazy to write a release note, explore it yourself. I'll get back to this later after my holiday.

Note: From v0.1.5, the save file location is changed from 

C:\Users\[Your Name]\AppData\Roaming\Godot\app_userdata\DesktopPurrfect 

to

C:\Users\[Your Name]\AppData\Roaming\BoonMakesGames\DesktopPurrfect

If you're updating from a previous version, please move your save file to the new location. (Or, just start a new save, the old version doesn't have much in the save file anyways.)