Corrected the mess caused by introducing default_nettype none into the design
verification netlists.  Also cleaned up the broken power-on-reset signaling,
and added connections from the user space to the I/O pad direct-to-pad analog
signal pins.
diff --git a/verilog/rtl/simpleuart.v b/verilog/rtl/simpleuart.v
index 66e1915..4fe9f0c 100644
--- a/verilog/rtl/simpleuart.v
+++ b/verilog/rtl/simpleuart.v
@@ -220,3 +220,4 @@
         end
     end
 endmodule
+`default_nettype wire