Message broker payload updates

[DFurnes]

Changes

Some lovely payload updates for the Message Broker. See #437. There are a few open questions that I posted in the issue, but putting this code up for preliminary review. :eyeglasses:

Example Payloads

Brittany is a user from the US who gave us her email, but no cell phone. We'll send her some emails then:

Wilhelmina is a user from the US who gave us her email and her cell phone. She therefore must love texting, so we'll send things to her phone:

---

For review: @angaither @DeeZone

[deezone]

@DFurnes In the case of example 2, if the app collects email and mobile please send both sets of info:

• user_country
• user_language

---

• email
  • email_template
  • email_tags
  • email_list_id
• MERGE_VARS

---

• mobile
  • mobile_tags
  • opt_in_path_id
• MERGE_VARS

In either or as a combo also send the MERGE_VARS values.

[DFurnes]

@DeeZone Done! Also addressed the feedback you provided in the issue.

[DFurnes]

@DeeZone The latest round of changes is ready for re-review! :)

[DFurnes]

Updated example payloads:

Email

Emailerina has provided her first name, birthdate, & email, and is from the US:

Mobile

Mobilerina has provided her first name, birthdate, email, & mobile number, and is from the US:

[deezone]

:+1:

[angaither]

:+1: