Add solutions for part 1

projects/01/Or8Way.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/01/Or8Way.hdl
+
+/**
+ * 8-way Or:
+ * out = (in[0] or in[1] or ... or in[7])
+ */
+
+CHIP Or8Way {
+    IN in[8];
+    OUT out;
+
+    PARTS:
+    Or(a=in[0], b=in[1], out=a1);
+    Or(a=in[2], b=in[3], out=a2);
+    Or(a=in[4], b=in[5], out=a3);
+    Or(a=in[6], b=in[7], out=a4);
+
+    Or(a=a1, b=a2, out=b1);
+    Or(a=a3, b=a4, out=b2);
+
+    Or(a=b1, b=b2, out=out);
+}