This way the dove tails are completely in the inner space. This also makes it
easier to build surrounding walls as the dove tail joint doesn't need extra
space.
Various places used Boxes.fingerHolesAt which did use the default setting. This way it was not possible to have multiple finger hole settings active at the same times for finger holes.
Now all parts that draw finger holes do no longer have FingerJointSettings but instead have an instance of FingerHoles. Boxes.fingerHolesAt also is an instance
of FingerHoles joining a setting with all the other default finger joint classes.
Florian Festi