Opinion Miner

https://ianstormtaylor.com/rendering-views-in-backbonejs-isnt-always-simple

http://www.ibm.com/developerworks/library/bd-avrohadoop/index.html?ca=dat

http://blog.51yip.com/mysql/1029.html

http://stackoverflow.com/questions/41031166/scala-extends-vs-with

http://alvinalexander.com/scala/how-to-use-case-classes-in-scala-match-expressions

http://www.bogotobogo.com/python/python_subprocess_module.php

Server elastic version must be same as Client elastic version http://stackoverflow.com/questions/33544863/java-elasticsearch-client-always-null