A more small update for labeling GNodes.
Changed color scheme when users performing copying method & add info to GPackageNode.
Added more information (offset, length of ASTNode) to GFieldNode, GClassNode & GMethodNode when creating nodes.
Implemented the functionality of showing related code segments in Eclipse Java editor when a user selects a node in Type Simple View.
Pulled up method of createTypeGNode from two visitors TypeVisitor and ChildrenVisitor to UtilGNode as a refactoring edit.
Changed the way of implementing field addition to type simple view by using AST instead of Java models.