/search 'layers' params about api

[hkrishna]

Yeah, I think this happened when we switched queries to use https://github.com/geopipes/elasticsearch-backend/blob/master/query/geo_distance.js. We no longer use params.layers in https://github.com/pelias/api/blob/master/query/search.js

Notice how it doesn't take layers as one of the options. So, maybe we add support for layers in https://github.com/geopipes/elasticsearch-backend/blob/master/query/reverse_geo_base.js#L8 ? Thoughts?

[missinglink]

I don't think the query needs to be changed, instead if we add a new param after this line named type as per this reference then we can control which types are searched.

[hkrishna]

yep, that works 👍

[missinglink]

resolved by #31