add categories and infoboxes as labels
Merge branch 'master' of https://github.com/R4chel/RecommendationGraph

* 'master' of https://github.com/R4chel/RecommendationGraph:
  Filter file and category links
  local and heroku requirements
  req
  switch is in place
  sigma
  d3, export to json, etc

Conflicts:
	crawler/wiki_crawler.py