... Rubygems
Otherwise, Bundler is stuck in endless "Resolving dependencies" loop.

...in the main README

...EADME

...ashie::Mash for easier access
 response = Article.search query: { match: { title: { query: 'test' } } },
 aggregations: { dates: { date_histogram: { field: 'created_at', interval: 'hour' } } }
 assert_equal 2, response.response.aggregations.dates.buckets.first.doc_count
 # => 2

...stence
Using the `Elasticsearch::Persistence::Repository` from previous commits,
this patch adds support for the ActiveRecord pattern of persistance
for Ruby objects in Elasticsearch.
The goal is to have a 1:1 implementation to the ActiveRecord::Base implementation,
allowing to use it as a drop-in replacement for similar OxMs in Rails applications,
with minimal changes to the model definition and application code.
The model implementation uses [Virtus](https://github.com/solnic/virtus)
for handling the model attributes, and [ActiveModel](https://github.com/rails/rails/tree/master/activemodel)
for validations, callbacks, and similar model-related features.
Example:
--------
require 'elasticsearch/persistence/model'
class Person
 include Elasticsearch::Persistence::Model
 settings index: { number_of_shards: 1 }
 attribute :name, String,
 mapping: { fields: {
 name: { type: 'string', analyzer: 'snowball' },
 raw: { type: 'string', analyzer: 'keyword' }
 } }
 attribute :birthday, Date
 attribute :department, String
 attribute :salary, Integer
 attribute :admin, Boolean, default: false
 validates :name, presence: true
 before_save do
 puts "About to save: #{self}"
 end
end
Person.gateway.create_index! force: true
person = Person.create name: 'John Smith', salary: 10_000
About to save: #<Person:0x007f961e89f010>
=> #<Person:0x007f961e89f010 ...>
person.id
=> "zNf3yxZDQsOTZfNfTX4E5A"
person = Person.find(person.id)
=> #<Person:0x007f961cf1f478 ... >
person.salary
=> 10000
person.increment :salary
=> { ... "_version"=>2}
person.salary
=> 10001
person.update admin: true
=> { ... "_version"=>3}
Person.search('smith').to_a
=> [#<Person:0x007f961ebc5b90 ...>]

...ls forms
 Started POST "/articles" for 127.0.0.1 at 2014年04月28日 19:03:35 +0200
 Processing by ArticlesController#create as HTML
 Parameters: {"utf8"=>"✓", "authenticity_token"=>"RS4ZqcdL8SPbo0g9kNzPG24D+PpspIit4SyOXcLhYXk=", "article"=>{"title"=>"With Date", "content"=>"", "published_on(1i)"=>"2014", "published_on(2i)"=>"4", "published_on(3i)"=>"1", "published_on(4i)"=>"15", "published_on(5i)"=>"00"}, "commit"=>"Create Article"}
 POST http://localhost:9250/articles/article [status:201, request:0.155s, query:n/a]
 > {"created_at":"2014-04-28T17:03:35.190+00:00","updated_at":"2014-04-28T17:03:35.190+00:00","title":"With Date","content":"","published_on":"2014-04-01T15:00:00.000+00:00"}
This has to be refactored into a Realtie

 Person.all.to_a
 # 2014年05月05日 15:02:24 +0200: GET http://localhost:9250/people/person/_search [status:200, request:0.047s, query:0.024s]
 # 2014年05月05日 15:02:24 +0200: > {"query":{"match_all":{}},"size":10000}
 # 2014年05月05日 15:02:24 +0200: < # {"took":24,"timed_out":false,"_shards":{"total":5,"successful":5,"failed":0},"hits":{"total":100,"max_score":1.0,"hits":[ .... ]}}
 # => [#<Person:0x007ff1d8fb04b0 ... ]

...ls.lookup_type

 Person.find_in_batches { |batch| puts batch.map(&:name) }
See: http://api.rubyonrails.org/classes/ActiveRecord/Batches.html#method-i-find_in_batches 

...block is not passed
Example:
 Person
 .find_in_batches(size: 100)
 .each { |batch| puts batch.results.map(&:name) }
 # => Test 0
 Test 1
 Test 2
 Test 3
 Test 4
See:
* http://ruby-doc.org/core-2.1.2/Object.html#method-i-to_enum
* http://blog.arkency.com/2014/01/ruby-to-enum-for-enumerator/ 

 Person.find_each { |person| puts person.name }
 # # GET http://localhost:9200/people/person/_search?scroll=5m&search_type=scan&size=20
 # # GET http://localhost:9200/_search/scroll?scroll=5m&scroll_id=c2Nhbj...
 # Test 0
 # Test 1
 # Test 2
 # ...
 # # GET http://localhost:9200/_search/scroll?scroll=5m&scroll_id=c2Nhbj...
 # Test 20
 # Test 21
 # Test 22
See: http://api.rubyonrails.org/classes/ActiveRecord/Batches.html#method-i-find_each 

 person.inspect
 #<Person {id: "NkltJP5vRxqk9_RMP7SU8Q", ..., name: "Test 100", ...}>

.../_type/_version are set per model instance
Previously, it was not possible to set a custom ID for a model, when creating/saving it.
This patch fixes this ridiculous oversight.
Also, when the model is saved into a *different* index than the class-level `index_name`, the `_index`
method returns it correctly. Also applies to `_type` and `_version`.

 repository.count
 Person.count

 people = Person.search query: { match: { name: 'smith' } },
 highlight: { fields: { name: {} } }
 people.first.hit.highlight['name'].first
 # => ["John <em>Smith</em>"]

...tom IDs

...s (delegated to gateway)

(Previously, only `DateTime` objects have been working)

...odel
Usage:
 $ bundle exec rails generate scaffold Person name:String email:String --orm=elasticsearch --force

...th persistence model
Usage:
 rails new music --force --skip --skip-bundle --skip-active-record --template /path/to/template.rb
 rails new music --force --skip --skip-bundle --skip-active-record --template https://raw.githubusercontent.com/elasticsearch/elasticsearch-rails/persistence-model/elasticsearch-persistence/examples/music/template.rb 

...ded more info into the README

...el into the README

...h/without Bundler
Closes #91