Add Prototype Menus + Tooltips

New Features
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- Added a basic html list navigation bar, and corresponding navigation.css 
- Removed node text labels and added names in tooltips instead
- Added sliding panel on left side that shows detailed information about clicked nodes

Misc. Changes
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- Moved slider to top right hand side and changed to vertical orientation to make room for navigation bar
- Externalized some of the css in display.html into topology.css
- Changed a few constants so the nodes are not bouncing as much on initialization
- Made the node circles scale with the zoom slider