Merge pull request #13 from wikipathways/master

update ap:master with latest work and builds from wp:master
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updated anchors so they are rendering again
Merge branch 'master' of https://github.com/wikipathways/pathvisiojs
Merge pull request #98 from khanspers/master

adds mouse-over style for groups
Merge branch 'master' of https://github.com/wikipathways/pathvisiojs
updated tests
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removed unneeded dependencies
Merge branch 'master' of https://github.com/wikipathways/pathvisiojs
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