Finish 1D network (*_net.nc) with discretisation extra manholes

[rhutten]

Finish 1D network (*_net.nc) with discretisation extra manholes:

1. create table csv with diameter/height, spacing, area (size), height manhole + add row for default manhole (diameter/heigth = 'default'
2. Get diameter of height of each branch
3. Get spacing based on table
4. Add spacing osm.branches
5. Generate discretisatisation use rural functionality --> only for urban
6. Get meshnodes - mesh link name
7. Split urban branches based on meshnodes.
8. Generate new branchID
9. Set branches again to datamodel
10. Generate discretisation all branches (rural & urban) in which urban does not get extra discretisation points.