ZelWord — portable Linux x86_64

Run it:   ./zelword

System requirements:
  - Linux x86_64 with glibc 2.31+ (Ubuntu 20.04, Debian 11, Fedora 33+, etc.)
  - GTK 3 and WebKit2GTK 4.1 system libraries (libwebkit2gtk-4.1-0 on Debian/Ubuntu)
  - X11 or XWayland display server

Install missing system libs (Debian/Ubuntu):
  sudo apt install libwebkit2gtk-4.1-0 libgtk-3-0

ZelEn quantum-safe encryption CLI is included at ./bin/zelen.
Documents save to ~/zelword/ by default.
