mailchimp 7.x-2.6

Changes since 7.x-2.5:

• #1449640: Changed subscribe form button to Save instead of Subscribe
• #1417928: Fixed duplicate email entry added to lists when user email is updated
• #1452326: Added a class to subscription forms
• Add API definitions.
• Add @merge_vars parameter to hook_mailchimp_subscribe_user().
• #1648882 by SeeSchloss: Add hooks on subscribing and unsubscribing from lists.
• #1616480 by mh86: Add list parameter to mailchimp_lists_merge_values().
• #1649290: Queue existing feature was not working as the 'op' parameter was not set in the queue.
• Ensure that cron runs for either the number of items in the queue or the batch limit size, whichever is smaller.
• #1649648: Fixed an error with mailchimp_lists_user_update
• #1659468: Fixed sort of list names in the add list form
• Fixed quote escaping on the signup form
• Swapped position of the lists and settings tabs
• #1635430: Fixed errors when the user is logging in with logintoboggan and rememberme enabled
• #1635828 by antipex: Added an update function to convert block deltas to the new format
• Added update function to change existing block deltas to the new format
• Fixed a typo in the queue existing link