Added class to store method information.
Added class to link two methods.
Added class to store class information.
Added class to store nodes and edges.
Added labels for literals and primitives.
Updated HashVisitor for new grammar.
Changed literal labels to format literal<Name>.
Added tab for primary labels.
Updated HashVisitor for the renamed literal labels.
Updated MagicNumberDetector to support the new grammer.
Updated MagicNumberDetectorTest to support the new grammer.
Added listener for generating nodes for callgraph.
Added listener for finding calls and adding Edges to the callgraph.
Moved global variables to 'this' MethodNode.
Fixed ClassNodeListener trying to add interfaces.
Fixed a nullpointer being returned from getGlobalVariables().
Added tests for MethodNode class.
Added tests for ClassNode class.
Added tests for CallGraph class.
Added tests for ClassNodeListener class.