Finish Chapter 14

Implements code chunks, a couple of basic opcodes, constants, and
basic execution of those opcodes.

Signed-off-by: Daniel Henry <iamdanhenry@gmail.com>

include/debug.h

@@ -0,0 +1,9 @@
+#ifndef clox_debug_h
+#define clox_debug_h
+
+#include "chunk.h"
+
+void disassembleChunk(Chunk *chunk, const char *name);
+int disassembleInstruction(Chunk *chunk, int offset);
+
+#endif /* clox_debug_h */