Rewritten options section
Used spaces instead of tabs
Added GPLv3 disclaimer;
Added help arg and new help page (--help);
Translating all the inline comments in English (one day .po & .mo for help page and "Mannaggia %s"?);
Increased execution speed (maniacally converting short "if then something fi" to "condition && something") (That does so much cool!);
Indented maniacally;
Added --oneshot (#2);
Rewritten options section (#7);
In short word: This merge edits from @henryx and from @valerio-bozzolan.