Merge pull request #2 from wikipathways/master

latest from wp
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Merge pull request #4 from wikipathways/master

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Merge pull request #5 from wikipathways/master

latest from wp master
removed dashed line from group type none
Merge branch 'master' of github.com:khanspers/pathvisiojs
Merge pull request #6 from wikipathways/master

latest from wp master
Merge branch 'master' of github.com:khanspers/pathvisiojs
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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
Update README.md