sort examples by platform

rework the travis tests
create ESP32 examples

examples/avr/WebSocketClientAVR/WebSocketClientAVR.ino

@@ -0,0 +1,84 @@
+/*
+ * WebSocketClientAVR.ino
+ *
+ *  Created on: 10.12.2015
+ *
+ */
+
+#include <Arduino.h>
+
+#include <SPI.h>
+#include <Ethernet.h>
+
+#include <WebSocketsClient.h>
+
+
+
+// Enter a MAC address for your controller below.
+// Newer Ethernet shields have a MAC address printed on a sticker on the shield
+byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
+
+// Set the static IP address to use if the DHCP fails to assign
+IPAddress ip(192, 168, 0, 177);
+
+WebSocketsClient webSocket;
+
+
+
+void webSocketEvent(WStype_t type, uint8_t * payload, size_t length) {
+
+
+    switch(type) {
+        case WStype_DISCONNECTED:
+            Serial.println("[WSc] Disconnected!\n");
+            break;
+        case WStype_CONNECTED:
+            {
+                Serial.print("[WSc] Connected to url: ");
+                Serial.println((char *)payload);
+                // send message to server when Connected
+                webSocket.sendTXT("Connected");
+            }
+            break;
+        case WStype_TEXT:
+            Serial.print("[WSc] get text: ");
+            Serial.println((char *)payload);
+            // send message to server
+            // webSocket.sendTXT("message here");
+            break;
+        case WStype_BIN:
+            Serial.print("[WSc] get binary length: ");
+            Serial.println(length);
+           // hexdump(payload, length);
+
+            // send data to server
+            // webSocket.sendBIN(payload, length);
+            break;
+    }
+
+}
+
+void setup()
+{
+    // Open serial communications and wait for port to open:
+    Serial.begin(115200);
+    while (!Serial) {}
+
+    // start the Ethernet connection:
+    if (Ethernet.begin(mac) == 0) {
+      Serial.println("Failed to configure Ethernet using DHCP");
+      // no point in carrying on, so do nothing forevermore:
+      // try to congifure using IP address instead of DHCP:
+      Ethernet.begin(mac, ip);
+    }
+
+    webSocket.begin("192.168.0.123", 8011);
+    webSocket.onEvent(webSocketEvent);
+
+}
+
+
+void loop()
+{
+    webSocket.loop();
+}