Fix: compilation of "ESP32_Test.ino" fails due to non-existent function "begin". (#205)

I guess the function was needed earlier in the development process but that no longer seems to be the case. Also doing some small other changes in order to get the sketch to compile.

Author: aentinger

Diff for: libraries/ESPhost/examples/ESP32_TEST/ESP32_TEST.ino

@@ -1,6 +1,9 @@
 #include "CEspControl.h"
 #include "CNetIf.h"
 #include <string>
+#include <vector>
+
+using namespace std;
 
 /* GPIO_LOCAL C33 
    - 0. P010 
@@ -79,7 +82,6 @@ void setup() {
   CEspControl::getInstance().listenForStationDisconnectEvent(stationDisconnectionEvent);
   CEspControl::getInstance().listenForDisconnectionFromSoftApEvent(disconnectionFromSofApEvent);
 
-  CEspControl::getInstance().begin();