Updated:

1. Update boot.bin to v1.5;

2. Add wifi_station_set/get_hostname API;

3. Update SmartConfig to version 2.5.3;

4. Support GPIO wakeup;

5. Enable IGMP in LWIP;

6. Add espconn_init in espconn.h;

A demo that should be run with ESP8266 RTOS SDK. This is the Initial version.