Give global options their own lifetime.

build.rs

@@ -72,7 +72,7 @@ fn write_header(test_file: &mut File) {
         r#"
 #[feature(exit_status_error)]
 use organic::compare_document;
-use organic::parser::document;
+use organic::parser::parse;
 use organic::emacs_parse_anonymous_org_document;
 use organic::parser::sexp::sexp_with_padding;