started implementing command find classes and added ClassContext
graph should not overwrite relation of existsing node if same node is
added again
started implementing class context builder
added find classes to commands
Implemented command findClasses
renamed find classes command to list classes
moved getCommandLineHelp to BaseCommand
implemented single child graph
added supper class support to class context
implemented super class support in class context
added option superClasses to listClasses command
implemented processing of archives which contain archives, like war and
ear files.
implemented command findDuplicateClasses