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/convert_gpio_sigs.v b/verilog/rtl/convert_gpio_sigs.v
index c7d53f3..89ee8b5 100644
--- a/verilog/rtl/convert_gpio_sigs.v
+++ b/verilog/rtl/convert_gpio_sigs.v
@@ -33,4 +33,4 @@
     assign gpio_mode0_pad = gpio_outenb;
 
 endmodule
-
+`default_nettype wire