Graph Script Code

- Added GraphUIListener.java for listening to UI events on the graph
- Added node properties panel
- Some code cleanup

- Added selection support
- Also accessible from script
- Loaded scripts and graph file names are now displayed in the relevant panel title

- Added support for directed graphs (generation)
- Added labeldistance.js - distance labeling algorithm samples

- Added borders to algorithm code (Script) and graph text panels
- Graph text is now displayed with vertex labels

Added graph text panel to allow textual changes to the graph (GraphEditPanel.java)

- Added Graph load and save actions
- Added 'setNewGraph' to Controller
- Switched to system look and feel

Next step for the algorithm is now provided as a function rather than a single number

This is an empty revision for padding.

UI Improvements: control panel now has icons and better arrangement

Moved actions (exit,load,save) to a menu bar (Menu.java)