use my name for a dir

Dependencies

• [2] SW7BSBMJ several bugfixes in saving/loading cursor position
• [3] HOWVSTWA a few more testable file-system operations
• [4] FQURPLDA new primitives for reading/writing files
• [5] ZQDQLLCL bugfix
• [6] ED4Z6ORC cleaner API for file-system access
• [7] FPY4LO2W make a few names consistent with snake_case
• [8] KKMFQDR4 editing source code from within the app
• [*] 3QNOKBFM beginnings of a test harness

Change contents

• replacement in run.lua at line 166
  [2.193]→[2.193:289](∅→∅)
  − return love.filesystem.getWorkingDirectory()..'/'..path -- '/' should work even on Windows
  [2.193]

  [2.289]
  + return App.current_dir..path
• replacement in app.lua at line 483
  [3.328]→[4.16535:16587](∅→∅),[4.16535]→[4.16535:16587](∅→∅)
  − App.source_dir = love.filesystem.getSource()..'/'
  [3.328]

  [4.16587]
  + App.source_dir = love.filesystem.getSource()..'/' -- '/' should work even on Windows