Impounded address feature

[nonprofittechy]

This adds a new feature that allows the interview author to control asking if an address or phone number is impounded.

New attributes:

• ALAddress.impounded (bool)
• ALIndividual.phone_impounded (bool)

There is a new keyword parameter for ALAddress.address_fields() and ALIndividual.address_fields(): ask_if_impounded (bool)

There is a new keyword parameter for all methods that display an address or part of an address, show_impounded. The same keyword can be used with the phone_numbers() method.

Finally, we add some new templates to allow translation of phrases related to impounded addresses:

• ALAddress.impounded_label
• ALAddress.impounded_output_label
• ALIndividual.impounded_phone_output_label

Here's a short demo interview:

---
include:
  - assembly_line.yml
---
mandatory: True
code: |
  users[0].phone_number
  users[0].address.address
  ending_screen
---
sets:
  - users[0].address.address
question: |
  Your address
fields:
  - code: |
      users[0].address_fields(ask_if_impounded=True)
---
id: your contact information
question: |
  What is your contact information?
subquestion: |
  Include at least **one** way to reach you other than by mail.

  ${ collapse_template(why_contact_info_needed_template) }
fields:  
  - Mobile number: users[0].mobile_number
    required: False
  - Other phone number: users[0].phone_number
    required: False
  - My phone number is impounded: users[0].phone_impounded
    datatype: yesno
  - Email address: users[0].email    
    datatype: email
    required: False
  - Other ways to reach you: users[0].other_contact_method
    input type: area
    required: False
    help: |
      If you do not have a phone number or email, provide
      specific contact instructions. For example, use a friend's phone number.
      But the friend must be someone you can rely on to give you a
      message.
validation code: |
  if (not showifdef('users[0].phone_number') and \
      (not showifdef('users[0].mobile_number')) and \
      (not showifdef('users[0].email')) and \
      (not showifdef('users[0].other_contact_method'))):
    validation_error(word("You need to provide at least one contact method."), field="users[0].other_contact_method")
      
---
event: ending_screen
question: |
subquestion: |
  If impounded:
  
  Address: ${ users[0].address_block() }
  
  Phone: ${ users[0].phone_numbers() }
  
  For impounded information sheet:
  
  ${ users[0].address_block(show_impounded=True) }
  
  ${ users[0].phone_numbers(show_impounded=True) }

I think this is fairly safe and I'm happy with the API, but happy to let this get some feedback from our grant partners before merging.