adds a `WINDOWS_INSTALL` flag to the install script. adds notes on the variables in the script.
Change steamcmd recommended to debian-buster-slim Update release grabber with curly braces on variables (readability). Add script for validating that download links actually exist with no errors. update gitignore.
Makes the script more noisy saying what it's doing.
Use the newer steamcmd zip.
add a steamcmd install script for people to use.
