Add source Code
Add Node's constracter
Add Attributes Edge Graph Class.
Add Eume GraphType
Add genDotString abstract method in BaseGraphObject.
Add genDotString abstract method in BaseGraphObject.
Add GenNodesString method.
Refactor getGraph to getGraphByteArray.
Imp all genDotString method.
Fix Attribute bug.
Add target folder.
Add Example.
Update Readme
Update Edge constractor.
Update Readme
Update Readme.