Refactored Vertex even more.
Refactored getAttributeValueInt to getAttributeValueFloat and all functions that used int to now use float.
Commented old (unused) tupolog code and try-catch statements from GraphFrame and PrologInference
Refactored Edge by adding new variables and attribute list. Refactored default constructor and removed old ones.
Created a method in Attribute for printing it (Name + value)
Refactored Vertex to use the new print method from Attribute