added url option for Tree plots#8

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mrjoh3 wants to merge 3 commits intojpmarindiaz:masterfrom

Commits on May 12, 2017

added URL option for "tree" plot. Can now use plot to open other web pages
Matt Johnson
committed
added URL option for "tree" plot. Can now use plot to open other web pages
Matt Johnson
committed
Merge branch 'master' of https://github.com/mrjoh3/d3plus
Matt Johnson
committed