Package elements provide a way of grouping elements together both visually, and in documentation.
Any element that is inside a package visually (ie has a higher depth, and is within it's bounds) is considered part of that
package. When you move a package, all of it's associated elements will be moved with it. This provides a convenient way to
move large groups of elements together. Packages can be nested inside each other for even better organization.
Package elements are not included in stub code or FlashMX documents, but they will appear in HTML documentation, including a
linked list of enclosed elements.