* First interim commit
* Fixes during testing
* Allow multiple edges to be hidden by a clustered edge.
Fix for #3245.
This fix adjusts the clustering edges so that theyi can refer to multiple edges instead of just one.
This API method is now insufficient, since multiple base edges can be returned.
- Added replacing method `clustering.getBaseEdges()`
- Adjusted example `changingClusteredEdgeNodes` for the new method. This is the *only* place where `getBaseEdge()` was used
- Adjusted documentation for new method and deprecation old method.
Method `getbaseEdge()` should now be considered `deprecated`, and in due time should be removed.
* Edits of method name in example
* Edits of method name in example
* adjusted deprecation method getBaseEdge() in docs
* Adjusted deprecation method for getBaseEdge() in docs