Finish Chapter 15

Implement a basic VM that is capable of simple math.

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

include/chunk.h

@@ -6,6 +6,11 @@
 
 typedef enum {
   OP_CONSTANT,
+  OP_ADD,
+  OP_SUBTRACT,
+  OP_MULTIPLY,
+  OP_DIVIDE,
+  OP_NEGATE,
   OP_RETURN,
 } OpCode;