[MODEL] Extract MyModel.client into a separate module

Example:
--------

    > Article.client( Elasticsearch::Client.new log: true );

    > Article.search('foo').results.map(&:_source).map(&:title)
    2013-11-08 20:29:28 +0100: GET http://localhost:9200/articles/_search?q=foo [status:200, request:0.004s, query:0.001s]
    2013-11-08 20:29:28 +0100: < {"took":1,"timed_out":false, ...}
    => ["Foo", "Bar"]

Author: karmi

elasticsearch-model/lib/elasticsearch/model.rb

@@ -6,6 +6,8 @@
 
 require 'elasticsearch/model/support/forwardable'
 
+require 'elasticsearch/model/client'
+
 require 'elasticsearch/model/adapter'
 require 'elasticsearch/model/adapters/default'
 require 'elasticsearch/model/adapters/active_record'

elasticsearch-model/lib/elasticsearch/model/client.rb

@@ -0,0 +1,16 @@
+module Elasticsearch
+  module Model
+    module Client
+
+      module ClassMethods
+
+        # Get or set the client
+        #
+        def client client=nil
+          @client = client || @client || Elasticsearch::Client.new
+        end
+      end
+
+    end
+  end
+end

elasticsearch-model/lib/elasticsearch/model/searching.rb

@@ -9,10 +9,6 @@ def search(query_or_payload, options={})
           Response::Response.new(self, response)
         end
 
-        def client
-          @client ||= Elasticsearch::Client.new
-        end
-
       end
 
     end