Initial work for supporting dot-cluster visualization of functions.
FIX: added missing initialization in DataDependenceVisualizer.
Added script showgraphs for processing all rdmain generated graphs.
Extended script showgraphs to allow for arbitrary file types.
Added preliminary support for clustered visualization of icfg and icfgdatadependencegraph.
Merge branch 'aananthakris1/codethorn' of rosecompiler1.llnl.gov:rose/edg4x/rose into schordan1/codethorn
Extended and refined ast matching documentation.
adding left out test cases
adding left out test case