Hyperlinked release notes can be found here:

https://pypsa.org/doc/release_notes.html#pypsa-0-11-0-21st-october-2017

This release contains new features but no changes to existing APIs.

* There is a new function network.iplot() which creates an interactive
  plot in Jupyter notebooks using the plotly library. This reveals bus
  and branch properties when the mouse hovers over them and allows
  users to easily zoom in and out on the network. See the SciGRID
  example for a showcase of this feature and also the (sparse)
  documentation Plotting Networks.

* There is a new function network.madd() for adding multiple new
  components to the network. This is significantly faster than
  repeatedly calling network.add() and uses the functions
  network.import_components_from_dataframe() and
  network.import_series_from_dataframe() internally. Documentation and
  examples can be found at Adding multiple components.

* There are new functions network.export_to_hdf5() and
  network.import_from_hdf5() for exporting and importing networks as
  single files in the Hierarchical Data Format.

* In the network.lopf() function the KKT shadow prices of the branch
  limit constraints are now outputted as series called mu_lower and
  mu_upper.

We thank Bryn Pickering for introducing us to plotly and helping to
hack together the first working prototype using PyPSA.