Started work on visitor pattern in the scene graph.
Made a small change to the scene graph visitor pattern
Extended SceneGraphVisitor with pre and post methods.
Finished implementing visitor pattern for scene graph traversal,
including one fully functional traverser in the GUI's scene overview
panel.
Fixed some bugs pertaining to the form panel, including the redrawing of
panels when changing tool.
Merge branch 'master' of git@github.com:happah-graphics/jhappah.git
Cleaned up GUI's scene overview panel in preparation for adding point
cloud functionality
Added new type of entry for scene overview panel: temporary point cloud
entry for point clouds that are not yet created
Added temporary point cloud entries in appropriate locations when
selecting the point cloud tool. Cleaned up a lot of code pertaining to
JTree handling in the scene overview panel.
Final commit in preparation of push, so work on the canvas can be
continued.