Included in this commit are the following changes:
- Change designator to path in Bus object
- Added InterfaceSelector object to allow individual intefaces to be accurately selected
- Complete interface selector portion of conduit calculation
Merge pull request #135 from cdearborn/pull-req-master-9cddd384d83cfe975039c0ae73f1d3bd4609a382

Network interface selectors [1/1]