Rewrote how sets are declared

now each set is a sub-object of sets. Like this: sets.animals.main for
the main collection of images. and sets.animals.bgs for the backgrounds
(or whatever subfolder you add)
big shrinker improvement

now the cursor starts randomly in the set
cleanup on some functions and old files
improved corner_box. cursor now randomly starts in the middle of the set
Working on a HUD for system information.

Access HUD with Enter.

also new hallway midi controls