autosave on keystrokes

Dependencies

• [2] YKRF5V3Z starting to load/save
• [3] JCSLDGAH beginnings of support for multiple shapes
• [*] OTIBCAUJ love2d scaffold
• [*] 6LJZN727 handle chords

Change contents

• replacement in main.lua at line 242
  [3.2109]→[2.158:190](∅→∅)
  − save_to_disk(lines, filename)
  [3.2109]

  [3.2109]
  + if filename then

  + save_to_disk(lines, filename)

  + end
• edit in main.lua at line 482
  [6.85]

  [6.85]
  + if filename then

  + save_to_disk(lines, filename)

  + end