v1.0.0

The refract GUI has been completely rewritten for this release, replacing GTK3 with the more Rust-centric and cross-platform iced library.

It is now more type-safe, easier to build from source, and all around better looking.

New

• -e/--exit-auto: automatically shut down once the final conversion has run;
• -s/--save-auto: save successful conversion to disk automatically instead of popping a file dialogue;

Changed

• Bump lodepng to 3.11;
• Various doc updates and improvements;
• Miscellaneous code changes and lints;