Frond End Assistance And Iterative Clean Up

This relates to XX-4076 and XX-4092. This is largely cleaning up documentation for front end. There was also clean up where I identified a bug in the client registration code-path as well a poorly named method off of reception identity.

This also included exposing IsRegisteredWithUd after front end specifically asked for a method to have UD registration context; they need to know if they have to show the page where the user inputs a username if not registered.

registration/register.go

@@ -8,8 +8,10 @@
 package registration
 
 import (
+	"encoding/base64"
 	"github.com/golang/protobuf/proto"
 	"github.com/pkg/errors"
+	jww "github.com/spf13/jwalterweatherman"
 	pb "gitlab.com/elixxir/comms/mixmessages"
 	"gitlab.com/elixxir/crypto/registration"
 	"gitlab.com/xx_network/comms/connect"
@@ -81,6 +83,13 @@ func register(comms registrationMessageSender, host *connect.Host,
 			"transmission confirmation message")
 	}
 
+	jww.WARN.Printf("UD DEBUG: IN NETWORK REGISTER:"+
+		"\ntimestamp: %d"+
+		"\nrsa pub key PEM: %s"+
+		"\nperm sig: %s",
+		receptionConfirmation.Timestamp, receptionPem, base64.StdEncoding.EncodeToString(receptionSignature),
+	)
+
 	// Verify transmission signature
 	transmissionSignature := response.GetClientTransmissionConfirmation().
 		GetRegistrarSignature().Signature