Restored MailChimpCampaignController references.
Broke template content parse code into own method, implemented in content preview. #68
Moved lists test constants into lists test class.
Moved campaigns test constants into campaigns test class.
Merge pull request #72 from thinkshout/7.x-3.x-test_constants_refactor

Moved test-related constants to more suitable locations.
Merge pull request #71 from thinkshout/7.x-3.x-content_preview_fix

7.x 3.x content preview fix
Remove redundant function mc_get_lists_by_email
Fix cache creation bug in get_member_activity
Refactor activity page rendering to use existing functions.
Remove markup in description to ease string translation.
Coding style.
Disable list selector on instance settings page.
Restrict list selection to lists not already connected to subscription fields.
Mitigate undefined value error is subscription status check.
Add Rules action for subscribing/unsubscribing to a list field.
Added Rules demo & export to Readme.
Moved merge vars into template content sections.
Moved entity import into template content sections.
Moved Site Content Import into MailChimp campaign filter tips. Moved Merge Vars into each content block.
Multiple entity import forms can now function on one page.