Bringing libesphttpd up-to-date (#504)
Bringing libesphttpd up-to-date (#504)

* libesphttpd: added extras and example

* Added "heatshrink" as a submodule

* Updated libesphttpd

* Updated libesphttpd

* Trying to fix the commit id

* Updated libesphttpd

* Added zlib1g-dev package

* Use native gcc to build mkespfsimage and mkupgimg

* Added NS and GW for DHCP server configuration

* Making libeshttpd up-to-date

* Making libeshttpd up-to-date (heatshrink updated)

* Making libesphttpd up-to-date

ourairquality/esp-open-rtos,SuperHouse/esp-open-rtos,SuperHouse/esp-open-rtos,bhuvanchandra/esp-open-rtos,ourairquality/esp-open-rtos,Zaltora/esp-open-rtos,urx/esp-open-rtos,SuperHouse/esp-open-rtos,urx/esp-open-rtos,UncleRus/esp-open-rtos,bhuvanchandra/esp-open-rtos,UncleRus/esp-open-rtos,UncleRus/esp-open-rtos,urx/esp-open-rtos,SuperHouse/esp-open-rtos,SuperHouse/esp-open-rtos,Zaltora/esp-open-rtos,Zaltora/esp-open-rtos,UncleRus/esp-open-rtos,SuperHouse/esp-open-rtos,UncleRus/esp-open-rtos,ourairquality/esp-open-rtos,bhuvanchandra/esp-open-rtos,Zaltora/esp-open-rtos,Zaltora/esp-open-rtos,urx/esp-open-rtos,bhuvanchandra/esp-open-rtos,urx/esp-open-rtos,ourairquality/esp-open-rtos,ourairquality/esp-open-rtos,urx/esp-open-rtos,Zaltora/esp-open-rtos,UncleRus/esp-open-rtos,ourairquality/esp-open-rtos