Transition to new literals compiling.

Tests still need work, as does the implementation for json.

src/parser/mod.rs

@@ -7,6 +7,7 @@ pub use parser::Body;
 pub use parser::DustTag;
 pub use parser::Filter;
 pub use parser::KVPair;
+pub use parser::OwnedLiteral;
 pub use parser::RValue;
 pub use parser::Special;
 pub use parser::Template;