copy_paths is a list of strings and two item sequences. If a copy_paths
element is a single string, it is treated as both the source and
destination paths. If the element is a sequence, the first element is
the source and the second is the destination.
NOTE: exclude_paths now uses file globs
TODO: Support globs for copy_paths
This allows setuptools to automatically find build_p3d and
bdist_p3d_archive.
NOTE: Importing direct.showutil.dist.setup still works for installs that
are not using wheels.
The keys to these new dictionaries are the name of the application to
create and the value is the script that is the entry point for the
application. This gets rid of the need for an Application class.
