Reorganize scripts directory.

This moves the dist, generation, get, and info scripts to the root of
the scripts directory.
Update 'README'.
Fix working root directory in 'dist'.

This makes the working root one directory back from the script.
Fix working roots in 'gen-packages' and 'list'.

This makes the working root one directory back instead of two.
Make 'get-packages' more intuitive.

This adds more descriptive output and removes some clutter.