Utility script to download and install asset packages

[semagnum]

A utility script for installing the optional packages.

As part of ASWF Dev Days, resolves DigitalProductionExampleLibrary/Assets #2.

# install all packages in current directory (will take a while)
python install_optional_packages.py --all
# you can provide a .zip filepath for each package if already downloaded, otherwise the script will download each for you
python install_optional_packages.py --techvar --baked_procedurals --texture_pack texture_pack_download.zip --cameras --output ./repos/ALab/

• Has the option to download them for you, or use an existing .zip file if you've already downloaded them
• An --all flag to download all, or you separate flags for just specific packages
• also updated the documentation to mention said script

[matthewlow-dwa]

Thanks @semagnum ! This looks good to me.

[chrizzFTD]

Thanks @semagnum! Great contribution.