Grouped the gates and corrected xnor16.v nor16.v (#6)

Alright!

gates/nand/nand16.v

@@ -0,0 +1,22 @@
+module nand16(y16, a16, b16);
+    input [15:0]a16;
+    input [15:0]b16;
+    output [15:0]y16;
+
+    nand(y16[0], a16[0], b16[0]);
+    nand(y16[1], a16[1], b16[1]);
+    nand(y16[2], a16[2], b16[2]);
+    nand(y16[3], a16[3], b16[3]);
+    nand(y16[4], a16[4], b16[4]);
+    nand(y16[5], a16[5], b16[5]);
+    nand(y16[6], a16[6], b16[6]);
+    nand(y16[7], a16[7], b16[7]);
+    nand(y16[8], a16[8], b16[8]);
+    nand(y16[9], a16[9], b16[9]);
+    nand(y16[10], a16[10], b16[10]);
+    nand(y16[11], a16[11], b16[11]);
+    nand(y16[12], a16[12], b16[12]);
+    nand(y16[13], a16[13], b16[13]);
+    nand(y16[14], a16[14], b16[14]);
+    nand(y16[15], a16[15], b16[15]);
+endmodule

gates/nand/nand3way.v

@@ -0,0 +1,13 @@
+module nand3way(y16, a16, b16, c16);
+    input a16;
+    input b16;
+    input c16;
+    output y16;
+
+    wire tmp0, tmp1
+
+    nand(tmp0, a16, b16);
+    nand(tmp1, tmp0, tmp0);
+    nand(y16, tmp1, c16);
+
+endmodule