* create-packages.rb takes an input directory containing all files as they are laid out in
the installation directory of an application, a JSON file mapping files to packages and
generates the file_list.xml file listing all files in the release along with the
.zip packages containing those files.
* Add single-package-map.json which is the simplest possible package map - putting
all files in a single package.
Per-project/build package maps can be written that separate files into different packages
based on the component they belong to.
This script replaces the autoupdate-setup tool written in C++ in the utilities/autoupdate-setup
directory in the desktop source tree.
