Added Serial.baudRate() to get current baud rate (#2079)

* Changed WifInfo settings and WeMos board name

* Added board name to have in sketch and MDNS/OTA

* board naming convention

https://github.com/esp8266/Arduino/pull/2054

* Added Serial.baudRate() to get current baud rate

* Added more description

- Added note about Software Serial Implementation
- Indicate this will works on ESP8266 boards only

cores/esp8266/HardwareSerial.h

@@ -133,6 +133,7 @@ public:
     void setDebugOutput(bool);
     bool isTxEnabled(void);
     bool isRxEnabled(void);
+    int  baudRate(void);
 
 protected:
     int _uart_nr;