Example project for external search

[betoboullosa]

Include description on how to set up an external index for testing

[az79nefy]

http://bart.ukp.informatik.tu-darmstadt.de:9200/common-crawl-en/_search is an example index that can be used for testing external search.

Does this issue represent the need to write documentation?

[reckart]

We cannot use that index in an example project because a) people cannot access it (firewalled) and b) nobody knows how long that service runs.

So we either need an example which documents how to set up a small Elasitcsearch server, import some documents, and then connect to that server from INCEpTION - or we need an example which shows how to connect to a "stable" external document repository like PubMedCentral.

[jcklie]

Maybe we can use PubAnnotation instead of ElasticSearch, as the former is publicly available.