v0.1.4

Changelog

• Add text line wrapping mode.
• Add keybinds.
  • Ctr-j, Ctr-n, Ctr-k, Ctr-p, Ctr-d, Ctr-u, Ctr-f, SPACE, Ctr-b, Ctr-a, Ctr-e
• Improve TAB replacement behaivor.
• Update README.
• Fix panic caused by invalid UTF-8 file.