Moved all src files into the src directory

Also fixed the "isNetworkConnected" for ESP8266

tools/AT_Spy/AT_Spy.ino

@@ -0,0 +1,45 @@
+/**************************************************************
+ *
+ * This script just listens in on the communication between an Arduino and the
+ * modem.
+ *
+ * TinyGSM Getting Started guide:
+ *   http://tiny.cc/tiny-gsm-readme
+ *
+ **************************************************************/
+
+// Set the baud rate between the modem and the board
+#define BAUD_RATE 9600
+
+// Set serial printing out the communication
+#define SPY Serial
+
+// Set serial for input from modem
+#define MODEM_TX Serial1
+
+// Set serial for AT commands (to the module)
+// Use Hardware Serial on Mega, Leonardo, Micro
+// #define BOARD_TX Serial1
+
+// or AltSoftware
+#include <AltSoftSerial.h>
+AltSoftSerial BOARD_TX;
+
+
+void setup() {
+  // Set console baud rate
+  SPY.begin(57600);
+  MODEM_TX.begin(BAUD_RATE);
+  BOARD_TX.begin(BAUD_RATE);
+  delay(5000);
+}
+
+void loop()
+{
+    while (MODEM_TX.available()) {
+      SPY.write(MODEM_TX.read());
+    }
+    while (BOARD_TX.available()) {
+      SPY.write(BOARD_TX.read());
+    }
+}