Add Ota and mdns (espressif#257)

* Add Sketch Update Library

* Add MDNS Library

* Add Arduino OTA Library

* add missing library file

* Add library files for Update

* Add missing headers

* fix ota command

* Add espota binary

* remove bad example

* PlatformIO does not auto forward declare methods like Arduino Builder

Author: me-no-dev

libraries/ArduinoOTA/examples/BasicOTA/BasicOTA.ino

@@ -0,0 +1,65 @@
+#include <WiFi.h>
+#include <ESPmDNS.h>
+#include <WiFiUdp.h>
+#include <ArduinoOTA.h>
+
+const char* ssid = "..........";
+const char* password = "..........";
+
+void setup() {
+  Serial.begin(115200);
+  Serial.println("Booting");
+  WiFi.mode(WIFI_STA);
+  WiFi.begin(ssid, password);
+  while (WiFi.waitForConnectResult() != WL_CONNECTED) {
+    Serial.println("Connection Failed! Rebooting...");
+    delay(5000);
+    ESP.restart();
+  }
+
+  // Port defaults to 3232
+  // ArduinoOTA.setPort(3232);
+
+  // Hostname defaults to esp3232-[MAC]
+  // ArduinoOTA.setHostname("myesp32");
+
+  // No authentication by default
+  // ArduinoOTA.setPassword("admin");
+
+  // Password can be set with it's md5 value as well
+  // MD5(admin) = 21232f297a57a5a743894a0e4a801fc3
+  // ArduinoOTA.setPasswordHash("21232f297a57a5a743894a0e4a801fc3");
+
+  ArduinoOTA.onStart([]() {
+    String type;
+    if (ArduinoOTA.getCommand() == U_FLASH)
+      type = "sketch";
+    else // U_SPIFFS
+      type = "filesystem";
+
+    // NOTE: if updating SPIFFS this would be the place to unmount SPIFFS using SPIFFS.end()
+    Serial.println("Start updating " + type);
+  });
+  ArduinoOTA.onEnd([]() {
+    Serial.println("\nEnd");
+  });
+  ArduinoOTA.onProgress([](unsigned int progress, unsigned int total) {
+    Serial.printf("Progress: %u%%\r", (progress / (total / 100)));
+  });
+  ArduinoOTA.onError([](ota_error_t error) {
+    Serial.printf("Error[%u]: ", error);
+    if (error == OTA_AUTH_ERROR) Serial.println("Auth Failed");
+    else if (error == OTA_BEGIN_ERROR) Serial.println("Begin Failed");
+    else if (error == OTA_CONNECT_ERROR) Serial.println("Connect Failed");
+    else if (error == OTA_RECEIVE_ERROR) Serial.println("Receive Failed");
+    else if (error == OTA_END_ERROR) Serial.println("End Failed");
+  });
+  ArduinoOTA.begin();
+  Serial.println("Ready");
+  Serial.print("IP address: ");
+  Serial.println(WiFi.localIP());
+}
+
+void loop() {
+  ArduinoOTA.handle();
+}

libraries/ArduinoOTA/keywords.txt

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+#######################################
+# Syntax Coloring Map For Ultrasound
+#######################################
+
+#######################################
+# Datatypes (KEYWORD1)
+#######################################
+
+ArduinoOTA	KEYWORD1
+
+#######################################
+# Methods and Functions (KEYWORD2)
+#######################################
+
+begin	KEYWORD2
+setup	KEYWORD2
+handle	KEYWORD2
+onStart KEYWORD2
+onEnd   KEYWORD2
+onError KEYWORD2
+onProgress KEYWORD2
+
+#######################################
+# Constants (LITERAL1)
+#######################################
+

libraries/ArduinoOTA/library.properties

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+name=ArduinoOTA
+version=1.0
+author=Ivan Grokhotkov and Hristo Gochkov
+maintainer=Hristo Gochkov <hristo@espressif.com>
+sentence=Enables Over The Air upgrades, via wifi and espota.py UDP request/TCP download.
+paragraph=With this library you can enable your sketch to be upgraded over network. Includes mdns anounces to get discovered by the arduino IDE.
+category=Communication
+url=
+architectures=esp32