Can't flash program on ESP32

[fabianoriccardi]

Hi,
I can't flash for ESP32 (tested with board variant d32). I cloned the last commit, but I can't make it work. Finally I've modified the line with the following:
ESPTOOL_PATH := $(lastword $(wildcard $(ARDUINO_ESP_ROOT)/tools/esptool_py/*))
I don't know why, but now I can compile for esp32, but not for esp8266.
Seems related to #102 ...

[plerup]

Please try latest commit

[fabianoriccardi]

That's perfect, thanks!