Added Haskell demo.
Merge branch 'interactive' into gh-pages
Merge branch 'interactive' into gh-pages
Updated distribution js file
Merge branch 'interactive' into gh-pages
Updated distribution js file
Merge branch 'interactive' into gh-pages
Fixed SVG scaling for firefox

SVG doesn't autoscale to contents in Firefox
Merge branch 'master' into gh-pages

Conflicts:
	dist/knowledge-graph.js
Changed node enter/exit points to semi circles
Merge branch 'master' into gh-pages

Conflicts:
	demo/index.html
Merge branch 'master' into gh-pages

Conflicts:
	dist/css/knowledge-graph.css
	package.json