feat(esptool_py): Add option to use soft reset after finishing downloading
feat(esptool_py): Add option to use soft reset after finishing downloading

Closes https://github.com/espressif/ESP8266_RTOS_SDK/pull/221

espressif/ESP8266_RTOS_SDK,espressif/ESP8266_RTOS_SDK,espressif/ESP8266_RTOS_SDK,espressif/ESP8266_RTOS_SDK,espressif/ESP8266_RTOS_SDK