displaying circles for a subset of papers

Basic file structure; feel free to change
Varying circle sizes + show titles
minor parametrization improvements
Added color palette
circle outlines only
Other approach for half-filled circles

instead of a colored stroke (which forces to modify the radius of the
circle), add a white circle on top with a radius as a % of the original
radius
quick code reorganization
display core and move away fringe
Papers on the fringe are distributed on a circle
Hidden scrollbars + try to highlight with shadow

problem: shadow is clipped...
Responsive layout + drawVis function
some clean up
Highlight selected node with shadow

d3.select(this) in an event callback!!!!
Improvements for highlighting
code cleanup
Papers moves to the left when clicked
Deselect when clicked again

weird problem: couldn't use true/false for the "selected" attr; it was
never false; I had to go back to 0/1
Enhance visual for highlighting and selecting
first attempt to draw toread
Much better definition of the region sizes

radius and apparent width; xoffset computed automatically