dependency list for Debian in README outdated

[jepler]

dependency list for Debian in README outdated

[linguisticturn]

On kubuntu 20.04 LTS (Focal Fossa), at least, though it's likely the same on other flavors of ubuntu, a successful installation (following which the program was working perfectly) proceeded as follows:

sudo apt install -y python-tk
sudo apt install -y python-pil
sudo apt install -y python-imaging-tk
sudo apt install -y libjpeg-progs
sudo apt install -y libimage-exiftool-perl
sudo apt install -y python3.8-distutils
git clone https://github.com/jepler/cropgui.git
cd ~/.local/share/kservices5/cropgui/
sudo bash ./install.sh -p /usr -P /usr/bin/python3