wed fix
Merge pull request #296 from jlaura/network

wed fix
point to node and wed cleanup
Merge pull request #297 from sjsrey/network

- updating filament for external filament incident with >1 region
Merge branch 'network' of https://github.com/pysal/pysal into network
Merge pull request #298 from jlaura/network

wed print removed and observation to node notebook