Avoid decisions between outer ways and multipolygons
Simplify object type checks
Avoid code duplication in ExcludeEdNodesPredicate ctor
Fix infinite recursion in previous commit
LPIS/RUIAN: unify createTracedEdObject code
RUIAN: move retrace geometry functions to a class
LPIS: add multipolygon retrace support
Remove unused imports
LPIS: tune connect/cleanup tolerancies