Add solutions for part 1

tools/builtInChips/Not16.hdl

@@ -0,0 +1,16 @@
+// This file is part of www.nand2tetris.org
+// and the book "The Elements of Computing Systems"
+// by Nisan and Schocken, MIT Press.
+// File name: tools/builtIn/Not16.hdl
+
+/**
+ * 16-bit Not gate: for i = 0..15: out[i] = not in[i]
+ */
+
+CHIP Not16 {
+
+    IN  in[16];
+    OUT out[16];
+
+    BUILTIN Not16;
+}