removed method public Set<V> getLeafPredecessors(V startVertex) from
ExtendedDirectedGraph
restructuring of code, moved private method to related public method
CallGraph only exposes GraphView, not internal graph structures
ClassContext does not expose internal graphs
removed method protected abstract void traverse(CallGraph callGraph, T
type, GraphVisitor<T, Dependency> graphPrinter); from
BaseDependencyGraphCommand
removed method  from protected abstract Set<T>
collectLeafObjects(CallGraph callGraph, T type);
BaseDependencyGraphCommand
moved getDependencyGraphCellStyle one up
introduced usage of member commandLine
introduced CommandContext
CommandContext uses persistent settings if no command line option for 3
options is given