1.6.12

• New: added links to the documentation in the plugin's admin bar item and the plugin's row (plugins page). There is more to come.
• Improvement: image attachments that don't have some mandatory WordPress metadata are not included in Imagify stats anymore.
• Fix: the "Optimized size" progress bar in the bulk optimization page now behaves like the "Original size" one does.
• Dev stuff: auto-optimization can be disabled on an attachment basis with the new filter imagify_auto_optimize_attachment. For example it can be used to disable auto-optimization for a specific file extension.
• Dev stuff: classes are now auto-loaded. Some constants have been removed.