Easy Digital Downloads - Reviews 2.2.5

Fix: Undefined index error when replying to a comment via the admin page.
Fix: Prevent unnecessary queries from running on every page.
Fix: Star ratings not displaying on front-end if CSS is disabled.

Improvement: Prevent guests from submitting replies to reviews to help cut down on spam.
Improvement: Refactor code to better follow WordPress coding standards.
Fix: EDD Reviews widget showing unapproved reviews.
Fix: Duplicate edd_reviews_average_rating post meta keys per download.
Fix: Possible error when bulk marking reviews as spam due to excessively large URL.
Fix: Remove invalid insert_review function hooking into init. This fixes an error with some WP-CLI commands.

Fix: Ensure custom code snippets cannot cause undefined index errors in the [downloads] shortcode
Fix: Enable review request emails to be sent when now is the selected time period
Fix: Compare version and only show admin notification for upgrade with outdated versions.
Fix: Verify that orders are complete or published before request review emails sent
Fix: Remove unused variable $post_id in class review widget
Fix: Use timestamp $now to ensure review request emails are being sent at correct time relative to store timezone.