Add underscore library to lib folder.
Improves graph css / html. Begins to create better graph template.
Figures out how to disable drag-scrolling on certain elements.

Experiments with constellation hover effects.
Add some more info about libraries used.
Improves directory structure. Separates styling out into its own file.
Streamlines node.js, integrating changes with other classes.
Adds error checking to Edge constructor.

Edits node template to work with new changes to Node class.