Object representation of the Installer element in the config.
This object holds the reference to all the Pages which in tern hold references
to the InputFields, All the properties in the Installer element are held at this level
as is the ResultContainer
Returns the list of selected targets from the installer obeying
page order. This method is
probably only usefull after the UI screens have finished. Using prior to that
bear in mind that the user in the Swing GUI can go back and reselect
targets that were not selected previously.
Page targets for pages that were not shown are not returned in the list
Parameters: ctx - Installer context Returns a Vector since Ant requires this for the Project class (Should be a List)