In this commit I add a human character, a traveler that can move around
a tiny world made of a single screen so far. :)
Materials used so far:
* 'HeartBeast' video lesons: https://goo.gl/3DtqPn
* The very informative and rich documentation of Godot itself!
For the Gamepad I used wonderful addon by fiaful:
https://github.com/fiaful/Gamepad
The beautiful arts are from "Open Pixel Project":
https://openpixelproject.itch.io
