WiFi Discovery test

Test WiFi discovery mechanism where the first device is configured with a web page on AP captive portal and from the second device onwards they can request the wifi credentials from the first device if in range.

Building

1. Clone the repo with git clone --recursive
2. Install makeEspArduino to ${HOME}/Arduino/makeEspArduino/makeEspArduino.mk (or change paths in Makefile)
3. Connect the ESP device
4. Change UPLOAD_PORT (and ESP_ROOT if needed) in Makefile, check other settings also
5. make upload