Fix up some minor things to make classes work (assembly-based)

src/vstc/virtual_machine/bytecode_decoder.rs

@@ -58,6 +58,7 @@ impl BytecodeType {
       0x0d => Pointer,
       0x0e => Register,
       0x10 => Builtin,
+      0x11 => Class,
 
       _ => std::panic!("Unrecognized BytecodeType"),
     };

src/vstc/virtual_machine/instruction.rs

@@ -97,6 +97,7 @@ impl Instruction {
       0x28 => JmpIf,
       0x29 => UnaryPlus,
       0x2a => UnaryMinus,
+      0x2b => New,
 
       _ => std::panic!("Unrecognized instruction: {}", byte),
     };