Easy Digital Downloads - Free Downloads 2.3.16

Fix: Emails not subscribed in MailChimp if email verification is enabled.
Fix: First and last name not set on new user accounts when user registration is enabled.

Fix: Improved reliability of subscribing users to MailChimp when they opt in for free downloads

-Fix: MailChimp integration was giving inconsistent results from non-free purchases.
-Fix: Some hooks were missing from the purchase link if the user was logged in.
-Fix: Privacy policy checkbox was not showing on the free downloads modal.