dam5s/happymapper — pull request #19 by zrob (2012-10-29 21:30:31+00:00)
Title: Add callback for setting Nokogiri ParseOptions

From Issue dam5s/happymapper#18

Allows us to register a callback to send to Nokogiri::XML() so we can modify ParseOptions. The callback is defined by [Nokogori](http://nokogiri.org/Nokogiri/XML/Document.html#method-c-parse)

```ruby
class Foo
include HappyMapper
has_one :bar, String

on_config do |config|
config.nonet
end
end
```