0.8.0 : * Add all the features of the current graphviz version 0.7.0 : * Add option "path" to output 0.6.0 : * Add undirected graph support 0.5.0 : * Preserve the original order of creation of nodes and edges 0.4.0 : * Add HTML-Labels 0.3.0 : * Bugs corrections 0.2.0 : * Pure ruby 0.1.0 : * Initial version