Create structure for targets.

src/parser/mod.rs

@@ -43,6 +43,7 @@ mod regular_link;
 pub mod sexp;
 mod source;
 mod table;
+mod target;
 mod text_markup;
 mod token;
 mod util;
@@ -97,6 +98,7 @@ pub use object::RadioLink;
 pub use object::RadioTarget;
 pub use object::RegularLink;
 pub use object::StrikeThrough;
+pub use object::Target;
 pub use object::Underline;
 pub use object::Verbatim;
 pub use source::Source;