Add url for each paper

README.md

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+![Screenshot of Vis](https://github.com/davidnmora/positive-psych-vis/blob/master/vis-screenshot.png "Screenshot of the vis")
+
 # positive-psych-vis
 Understanding of how positive psychology's research papers, authors, and applications fit together remains trapped inside the minds of experts — how do we give novices that sort of perspective on the field's "knowledge landscape"?
 
+This project visualizes the citation network 19 of positive psychology's most important authors interactively over time, showing all the papers they've written, and drawing links between papers who were highly influential on each other.
+
 ## How to use:
 Download repo, then 
 ```