initializing mailchimp_list_field.inc file & field definition.
Enforce cardinality of 1 on mailchimp_lists_subscription fields.
Creating dynamic field instance settings form for mailchimp_lists_subscription field
Initial configuration of field widgets and formatters.
Cleaning up field_info definitions.
Generating mailchimp_lists_fieldmap_options to replace mailchimp_fieldmap_options.
Fix default values on mergefields to be persistent.
Use current subscription status to generate default list subscription values.
Create basic field formatters.
Basic field_formatter_settings_summary() outline.
Adding field_formatter_view definition for default display and skeleton for form display.
Basic entity property callbacks for subscription field to allow access from entity metadata wrappers.
Implementing hook_field_presave() to perform subscription operations based on field values.
Create mailchimp_lists_subscribe_form for embedding subscription forms in a view mode.
Updating helper functions for interest groups.
Basic implementation for execute_changes without cron functionality.
Incorporate interest groups in forms and configuration.
Add configuration for default values on interest groups and interest group label.
Use shared mcapi object on change execution loops.
Create alter hook to allow manipulation of merge variables.