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/spimemio.v b/verilog/rtl/spimemio.v
index a982981..dc37126 100644
--- a/verilog/rtl/spimemio.v
+++ b/verilog/rtl/spimemio.v
@@ -740,3 +740,4 @@
     end
 endmodule
 
+`default_nettype wire