mailchimp 6.x-2.0-rc5

Aside from many bug fixes, this release features API based login rather than username and password, introduces batch cron processing, and individual blocks for each list. Overall, there are many new features and improvements, some of them from the community. Thanks for the help! After all of this gets a good round of testing, I think we're ready for to remove the RC label and create an official 2.0 release. Just in time to start the D7 port ...

• Implement a block for each available list and other minor changes
• #818146 by smk-ka: Untranslatable watchdog messages
• Add drush command to run MC batch update, #779468: Add drush command to run MC batch update
• fixed an error when updating a users newsletters when the mergevars were empty
• fix error in db_query_range usage introduced with batch updates, #682716: Improve cron handling (don't update all users)
• convert to using MC API key rather than username and password, #799004: Use API key instead of username/password (MC API FAQ#5)
• fix typo in hook_install, #800106: Module Install Broken
• change pending updates schema to allow for more flexibility and avoid delete conflicts #682716: Improve cron handling (don't update all users)
• adding missing title and ID tags for lists shown in blocks to anonymous users, #790352: Missing list title in block for anonymous users
• improve cron handling by adding batch processing, #682716: Improve cron handling (don't update all users)
• ensure a valid MC object in hook_user() #714658: Unable to unblock new users
• problems with registration form, #724992: Extra submit button on RC4 user registration page
• update to latest version of MCAPI wrapper class (1.24)
• only show newsletter form on register/account pages if there are applicable newsletters
• set MCAPI timeout to 60 seconds rather than the default 300
• adding hook_uninstall() #704450: Module should implement hook_uninstall()