Add project 2 template files

02/Add16.hdl

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+// This file is part of www.nand2tetris.org
+// and the book "The Elements of Computing Systems"
+// by Nisan and Schocken, MIT Press.
+// File name: projects/2/Add16.hdl
+/**
+ * 16-bit adder: Adds two 16-bit two's complement values.
+ * The most significant carry bit is ignored.
+ */
+CHIP Add16 {
+    IN a[16], b[16];
+    OUT out[16];
+
+    PARTS:
+    //// Replace this comment with your code.
+}