moneyadviceservice/mortgage_calculator — pull request #202 by didlix (2014-08-13 11:18:50+00:00)
Title: Remove PersonOne and PersonOther models

- Use only Person model
- Add allow_blanks param to Person.new to optionally disable validation on
person's income.

```ruby
person_with_blanks = Person.new({}, false);
person_without_blanks = Person.new({
annual_income: annual_income,
extra_income: extra_income,
monthly_net_income: monthly_net_income});
```