provide sample implementation for store

[steffkes]

just to give a new user an idea of what load/3 would actually look like, i've copied the test code to the README

[coveralls]

Coverage remained the same at 72.487% when pulling a5c8352 on steffkes:steffkes-patch-2 into ce904e5 on infinitered:master.

[steffkes]

@danielberkompas anything else you need before this will get merged?

[danielberkompas]

@steffkes This isn't actually the example I would use. I would show an Ecto-based store, which is what most people will need.

defmodule MyApp.ElasticsearchStore do
  @behaviour Elasticsearch.Store

  import Ecto.Query
  
  alias MyApp.Repo

  def load(schema, offset, limit) do
     schema
     |> offset(^offset)
     |> limit(^limit)
     |> Repo.all()
  end
end

[steffkes]

i'm not using ecto, so the example we had in the tests before were perfect, either way .. more concrete examples are always helpful