- Splitting of shapes on output of booleans
- A bugfix: error happened when pulling intruders from second-next hier level
- Tests added
- Some TODO comments added
* Modification of the mapping is possible now
(#map used to ignore mappings if there was one
already)
* Added DropCell mapping (also for RBA)
* Added unit tests for cell mapping, layer mapping
db::merge_layouts, db::copy_shapes and db::move_shapes