#17 first implementation of server handling for butler integration
#17 introduced method to retrieve butler result files for an request id
#17 javadoc for public methods of ButlerProductGenerator
#17 using ButlerProduct class to define parameters for server action
#17 making ButlerPoduct, ButlerFormat and ButlerResolution classes public to allow client access
#17 jalopy
#17 making ButlerProduct and referenced classes serializable since they are also used in the client
#17 using ButlerProduct as parameter in butler server action
#17 jalopy
#17 server saves open butler 1 orders to inform client during startup phase
#17 server side actions for refreshing pending butler downloads
#17 serializing open butler orders to an log file and restore them during server restart
#17 fixed several bugs