Print help if no arguments. Documentation improvements.
Print help if no arguments. Documentation improvements.

princeofdarkness76/sial.org-scripts,thrig/scripts,princeofdarkness76/sial.org-scripts,thrig/scripts,thrig/scripts,princeofdarkness76/sial.org-scripts,thrig/scripts,thrig/scripts,princeofdarkness76/sial.org-scripts,thrig/scripts,princeofdarkness76/sial.org-scripts