Add readme

Author: lucalas

README.md

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+# Streamlabs Arduino Alerts
+A work in progress library to connect to your Streamlabs account and catch all the Twitch events.
+
+## Twitch event catchable
+
+ - Follow
+ - Subscription
+ - Donation
+ - Raid
+ - Host
+ - Bit
+
+## Supported Hardware
+ - ESP8266 [Arduino for ESP8266](https://github.com/esp8266/Arduino/)
+ - ESP32 [Arduino for ESP32](https://github.com/espressif/arduino-esp32)
+ - ESP31B
+ - Particle with STM32 ARM Cortex M3
+ - ATmega328 with Ethernet Shield (ATmega branch)
+ - ATmega328 with enc28j60 (ATmega branch)
+ - ATmega2560 with Ethernet Shield (ATmega branch)
+ - ATmega2560 with enc28j60 (ATmega branch)
+ - 
+## Methods
+#### connect(socket_token)
+Method to connect to Streamlabs server, required [socket token](https://streamlabs.readme.io/docs/sockettoken).
+
+#### followTwitchEvent(callback)
+#### subscriptionsTwitchEvent(callback)
+#### hostTwitchEvent(callback)
+#### bitsTwitchEvent(callback)
+#### raidsTwitchEvent(callback)
+#### donationEvent(callback)
+#### loop()
+
+## Example
+##### Connection
+```c++
+char* socketToken = "token";
+StreamlabsAPI streamlabsAPI.connect(socketToken);
+```
+##### Event Callback
+```c++
+void followerEvent(const char* payload) {
+	Serial.print("got followerEvent message: ");
+	Serial.println(payload);
+}
+streamlabsAPI.followTwitchEvent(followerEvent);
+```
+
+##### Loop Method
+loop method is **required** to make this library work.
+```c++
+void loop() {
+    streamlabsAPI.loop();
+}
+```
+
+
+Event result documentation can be found on Streamlabs WebSite [HERE](https://dev.streamlabs.com/docs/socket-api)
+
+### Issues ###
+Submit issues to: https://github.com/lucalas/StreamlabsArduinoAlerts/issues