Code & anything distributed with this license except items mentioned below is
(c) 2019 Nigel Garnett under the MIT licence.
See: https://opensource.org/licenses/MIT

Icon Images derived by scaling & editing from:
    https://game-icons.net
    Attribution 3.0 Unported (CC BY 3.0) licence.
    See: https://creativecommons.org/licenses/by/3.0/

    Attributions:
        "Check mark icon" by Delapoite
        "Processor icon" by Lorc
        "Load icon" by Delapoite
        "Save icon" by Delapoite
        "Exit door icon" by Delapoite
        "Button finger icon" by Delapoite
        "Uncertainty icon" by Lorc
        "Cancel icon" by sbed
        "Trash can icon" by Delapoite
        "Knapsack icon" by Lorc
        "Tortoise icon" by Delapoite
        "Cube icon" by Delapoite
        "Dig dug icon" by Lorc
        "Race car icon" by Skoll
        "House icon" by Delapoite
        "Lion icon" by Lorc
        "Dinosaur Rex icon" by Lorc
        "Goat icon" by Skoll
        "Horse head icon" by Lorc
        "Parrot head icon" by Lorc
        "Bear head icon" by Delapoite
        "Rhinoceros horn icon" by Delapoite
        "Anticlockwise rotation icon" by Delapoite
        "Clockwise rotation icon" by Delapoite
        "Mushroom cloud icon" by Lorc

Turtle texture derived from
    Mini Turtle 1.13 by neoshard
    Attribution 3.0 Unported (CC BY 3.0) licence.
    See: https://creativecommons.org/licenses/by/3.0/

    Altered version (as included herin)
    (c) 2019 Nigel Garnett
    Attribution 3.0 Unported (CC BY 3.0) licence.
    See: https://creativecommons.org/licenses/by/3.0/
