Merge pull request #2 from wikipathways/master

latest from wp
Merge pull request #3 from wikipathways/master

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

latest from wp master
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
adds mouse-over style for groups
Merge pull request #98 from khanspers/master

adds mouse-over style for groups