Add Leading Inset and Trailing Inset attributes
Fix wrong Array Attribute names, critical!

No one ever reported this as a bug, so it’s not very used feature :-/
Add Leading Offset and Trailing Offset attributes
New Array method to keep Leading Offsets equal
Add Leading Align and Trailing Align attributes and methods
Add First Baseline and Last Baseline attributes and methods

Plain Baseline is now deprecated, use one of the new ones.