
*) Set sizes of package node to average size of classes? 
*) Stop rendering of sub trees for a given node (right-click menu?)
*) Select one node and use that as root (right click menu?)
*) Show list of selected jar files
*) Allow the user to add text on the graph.
*) Full command line interface for integration in automatic build process,
   including specification of filter and the size of the generated graph
*) Complex png export (set width/height, ...)
*) Make parser interface to be able to handle several languages.
*) Make a parser for java source files.
*) Tooltips do not seem to work for a lot of people (svm_invictvs_, 
   g[r]eek, ...), may be windows-issue.
