Merge pull request #1 from wikipathways/gh-pages

update ap:gh-pages with latest work and builds from wp:gh-pages
Merge pull request #2 from wikipathways/gh-pages

update ap:gh-pages with latest work and builds from wp:gh-pages
hierarchical data structure for dependencies starting to take shape
more updates to rendering
making progress on rendering groups, but still not done
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
moved node elements into node directory
refactoring to render groups and entity nodes moving along successfully
custom symbol now working
z-index somewhat working
groups now working
corrected some minor details on shapes
edges starting to work
clicking to show annotations not working yet
text is on its way to working
still working on getting text into nodes
text element now added, but still need to add attributes