[Not ready] Adding synonyms filter to pelias

![](http://www.gfycat.com/SardonicFlakyBrontosaurus)

* [ ] Add analyzer to ```settings.js```
* [ ] Add analyzer-related tests in https://github.com/pelias/schema/blob/master/test/settings.js
* [ ] Determine location of ```synonyms.txt``` (in my system, the only place I've made it work with has been ```/usr/local/Cellar/elasticsearch/1.2.1/config/analysis```)
* [ ] Hook pelias-synonyms to generate the file and plug it directly to ES