v1.7.3

1.7.3 - November 3rd, 2018

Changes:

• New: Introduce support for new Timeline Express - This Day in History Add-On and Timeline Express - Sliders Add-On.
• New: Introduce timeline_express_transient_name filter to customize the transient name
• New: Introduce JavaScript events during specific points of execution: timelineLayoutStart, timelineLayoutComplete
• Tweak: Adjust CSS styles on certain elements on the timeline.

Internal Changes

• Add additional doc blocks to functions for