ESP32 #83: Arduino easy installation

Development Environment
ubuntu 18.04 64 Bit (https://www.ubuntu.com/) (unity)
Eclipse Oxygen (https://www.eclipse.org/)
esp-idf (https://github.com/espressif/esp-idf)
xtensa-esp32-elf-gcc (https://dl.espressif.com/dl/xtensa-esp32-elf-linux64-1.22.0-80-g6c4433a-5.2.0.tar.gz)
Arduino 1.8.5 (https://www.arduino.cc/)
arduino-esp32 (https://github.com/espressif/arduino-esp32)
KiCad (http://kicad-pcb.org/)