0.8.0

This is a major update to the api. It focuses on the edge and vertex methods in Graph. These methods
provide developers with the flexibility to create and configure the objects as they see fit. All edge
and vertex methods return the object which allows the object to be configured with the << operator.
The methods use *Spec objects to store specifications for the edge or vertex and then applies it to the
graph. See the groovydoc for more details.

• upgraded to groovy-2.4.10
• Adding edge and vertex methods to Graph which provides many new ways to manipulate a graph.
• Vertices can be renamed and edges can be moved to different vertices.
• Anytime a vertex is referenced it will be created.