Create a .vlw font on the fly from either a font name that's
installed on the system, or from a .ttf or .otf that's inside
the data folder of this sketch.
Preferred method of creating new PImage objects, ensures that a
reference to the parent PApplet is included, which makes save() work
without needing an absolute path.
Called by the browser or applet viewer to inform this applet
that it is being reclaimed and that it should destroy
any resources that it has allocated.