hierarchical data structure for dependencies starting to take shape
more updates to rendering
making progress on rendering groups, but still not done
Merge pull request #24 from wikipathways/gh-pages

latest
added pointer cursor on hover for data nodes and interactions
changing the background color of annotations panel
complex shape now renders, but code is messy
complex shape renders better
group and some data nodes now render
Merge branch 'gh-pages' of https://github.com/khanspers/pathvisio.js into gh-pages