mailchimp 7.x-2.0-rc1

Changes since 7.x-2.0-beta2:

• Required validation on required merge fields.
• Ensure that the authenticated role is set for account objects on the user registration form.
• Updating README.
• Revamped list form to remove tabs and improve overall usability.
• Improving help text on STS admin page.
• Change menu title and description for lists.
• Add validation to ensure mail mergefield is set correctly.
• Make the list label a required field.
• Only allow free form lists to be associated with anonymous users.
• Require a token mapping of required margevariables from MC when creating a list. Related to #1203270.
• Force email mapping and make the form field disabled. Ref #1203210.
• Logic correction when getting available lists for a given user. Ref #1203232.
• Adjusted mailchimp_lists_freeform_subscribe_page_access() so MC admins have access regardless.
• Adjusting max length of list label and form field to match schema.
• #1203166: Don't unsubscribe users when submitting new user registration.
• Remove Amazon from status message.
• Messaging and link cleanup.
• Revamped STS debugging by adding a test mail interface and a mailchimp_sts_status variable rather than just on/off switch.
• Use the message id rather than key as the STS tag.