Including shared pde files across projects

“Sketchbook/”:

+---libraries
|   \---Palette
|       \---library
|               Palette.jar
|
\---PaletteJarSketch
        PaletteJarSketch.pde
  1. "Sketchbook"/libraries/Palette/library/Palette.jar
  2. "Sketchbook"/PaletteJarSketch/PaletteJarSketch.pde