add delay after power on to examples, minor bugfixing

examples/AFSK_SerialMessenger/AFSK_SerialMessenger.ino

@@ -47,6 +47,7 @@ void setup() {
   pinMode(RESET_PIN, OUTPUT);
   // turn on the radio
   digitalWrite(RESET_PIN, HIGH);
+  delay(5); // wait for device to come up
   
   Serial.begin(9600);
 
@@ -58,7 +59,7 @@ void setup() {
   radio.setSQHiThresh(-100);
   radio.setSQLoThresh(-100);
   radio.setSQOn();
-  radio.bypassPreDeEmph();
+  //radio.bypassPreDeEmph();
   dds.start();
   afsk.start(&dds);
   delay(100);