Add format => false back onto routes
Update the form to reflect starting child question change

For the starting child we now need to know the start and end dates, not
just the start date. These changes accommodate that, along with lots of
small bug fixes and tidying up.
Remove manifest line
Redirect to action rather than URL
Merge branch 'master' into add_child_benefit_calc
Hide the extra income fields by default and add button to show them
Merge pull request #2 from alphagov/add_child_benefit_calc

Add child benefit calc