There was often a mix between absolute and relative paths and in the
previous version, the destination argument was usually an absolute
path where the glob array (from Dir['*']) was a relative path.
The `BuildCommand` class is responsible for handling the building of the site.
It can also optionally watch for changes to files and regenerate the site if
needed.
The `Command` class holds any methods which are used by any command
implementation.
Parker Moore
Tom Bell