Add log example and remove unnecessary header file

Author: kcl93

examples/FUSB302_Log_Example/FUSB302_Log_Example.ino

@@ -0,0 +1,18 @@
+#include <Wire.h>
+#include <PD_UFP.h>
+
+#define FUSB302_INT_PIN   12
+
+PD_UFP_Log_c PD_UFP;
+
+void setup() {
+  Wire.begin();
+  PD_UFP.init_PPS(FUSB302_INT_PIN, PPS_V(8.4), PPS_A(2.0));
+  
+  Serial.begin(9600);
+}
+
+void loop() {
+  PD_UFP.run();
+  PD_UFP.print_status(Serial);
+}