1.4.0

• Add the -m, --add-multiple option to add multiple tasks at once: 8e9d375
• Add short version flag, improve help message: 65f530e
• Refactor code and fix bugs: 96f393f
  • Fix not working recursive search if current directory is MDT_DIR.
  • Fix subtasks not displaying on some systems if -u option isn't passed.
  • Add compatibility to allow the use of 1/0 instead of true/false for -u option.
  • Change short option names to long for better readability.
  • Use traditional if-else statement for $_selected_items to improve readability.
  • Group functions: move die() function in the beginning.
  • Fix typos.