lots of changes, created Disassembler class, removed a few globals etc.

tests/initial_base/INTOPS.C

@@ -0,0 +1,16 @@
+#define TYPE int
+
+main()
+{ TYPE a, b;
+
+	a = 255;
+	b = 143;
+	b = a + b;
+	a = a - b;
+	a = a * b;
+	b = b / a;
+	b = b % a;
+	a = a << 5;
+	b = b >> a;
+	printf ("a = %d, b = %d\n", a, b);
+}