Remove whitespace
Moved finger macro to top of file
Removed duplicated arguments to finger macro
Moved common parts (the .finger selector) into the .x-finger macro
Forgot to remove "-finger" from "direction-line-finger" class
Added spacing
Consolidated the .try code that relates to fingers
Added .note to all things that should be a note
Moved .interactive.um into the .interactive block
Reformatting the various notes
Fixed exercise solution bug

should only apply to exercises in .try, not all exercises
Moved all the .try code into one area
Moved .lab code into one area
Moved the .try to the bottom because it is complex and messy
Moved .calculator to top because it is simple
Moved .x-feature before it is used
Added .note to all statistics notes
Moved .generic-note into one block
Moved all notes into one block
Moved statistics block to the top of the file