During development, sometimes it is useful to be able to cache arbitrary files as part of the work. The build-overrides.sh script should be updated to allow for handling this.

Two new flags will be added:

1. "-c" Cache a single local file or download and cache a single remote file starting with "http(s)://"
2. "-C" Cache all files listed inside the specified text file, each line similar to the singular "-c" option above. The list file itself can be local or downloaded if starting with "http(s)://". Comment lines starting with "#" are supported, as is safely handling empty lines or lines with leading or trailing whitespace.