Update README.md
Added extra testcases for Factivia, changed scraper for those articles.
Updated travis / readme to elasticsearch 1.3.1
Fixed set logic bug. Intersection -> union (& -> |)
Enabled dynamic scripting for Travis' elasticsearch
Added insertscript to aggregate API filter field. Fixes #240.
move to elastic aggregations
Also move statistics to aggregation
Add length BEFORE calculating hash
Add terms statistics to aggregate api
change split to create_articles rather than save
proper issue redirection, fixes #249