Merge pull request #23 from wikipathways/gh-pages

latest from anders
removed old node and edge generation code and replaced with json-ld compatible code
annotation viewer is working again
Merge branch 'gh-pages' of https://github.com/khanspers/pathvisio.js into gh-pages
Merge pull request #2 from wikipathways/gh-pages

update ap:gh-pages with latest work and builds from wp:gh-pages