Made a new "src" folder that will contain the source code files, like all the GDScript and scene files. Please read this for more details: https://www.gdquest.com/docs/guidelines/best-practices/godot-gdscript/
It made no sense to keep scenes separate from their scripts. More file organizing will follow soon.
The bucket tool can now use Patterns instead of colors to fill areas. They get loaded from the "Patterns" folder, similar to how Brushes and Palletes work. You can no longer use brushes for the bucket tool.
Folders "Brushes", "Palette" and "Palette/Custom" now get created if they don't exist (tested on Windows export).
Also, the palettes don't need the Default palette to work anymore, and Default along with bubblegum16 aren't copied to the Palette folder now.
They're like File brushes, but each time you draw, expect to see something different!
To make a random brush, just put the images you want in the same folder (under the main Brushes folder of course), and make sure their filename starts with "%".
I also changed _process() to _input() in Canvas.gd, so there may be some unexpected behavior.
