elasticsearch/elasticsearch-rails — pull request #64 by emptyflask (2014-04-02 23:05:10+00:00)
Title: Hashie::Mash existence methods should always delegate to @result._source

Before:
```ruby
@result.title #=> "Example"
@result.title? #=> false
@result._source.title? #=> true
```

With this change:
```ruby
@result.title #=> "Example"
@result.title? #=> true
@result._source.title? #=> true
```