Add TCP-based NAL implementation (#24)

* Adding TCP-based NAL implementation

* Updating NAL dependency

* Updating connect to handle network errors

* Adding support for getting IP and MAC, allowing transparent access to the W5500 in the interface.

* Fixing TCP connect when not in INIT

* Adding wait after reset

* Reverting changes

* More delta reductions

* Fixing format

* Updating changelog

* Fixing docs

* Updating NAL version

* Adding debug derive

* fixing TCP write

* Updating RX receive size to allow less than 8 bytes

* Fixing clippy lints

src/uninitialized_device.rs

@@ -12,6 +12,7 @@ pub struct UninitializedDevice<SpiBus: Bus> {
     bus: SpiBus,
 }
 
+#[derive(Debug)]
 #[repr(u8)]
 pub enum InitializeError<SpiError> {
     SpiError(SpiError),