+Things to Ponder
+----------------
+
+Grouping items on different layers currently makes the items *not* on the current layer disappear. Not sure how this should be handled... Maybe we should honor the top level Container's attributes, and not the attributes of the contained objects?
+
+
+Bugs
+----
+
+ - Add new dimension doesn't honor the scale parameter set by user
+ - Dimension object prevents system from finding intersections when near or on
+ object intersection
+ - Pen marker doesn't set attributes on the highlighted part of the group.
+ - Can't move objects to other layers
+ - Dimension lines extents aren't properly taken into account when printing