API is on the webpage, attached to the release, or can be built from the source. Is there really any need to keep it in this repository? Maybe it can be rebased out?
remove all mention of .attach_response() and replace by .remove_response(inventory, ...)
add basic instruction info for notebook 08 "basic processing exercise" (data in provided files is from INGV fdsnws and not the usual IRIS default of other notebooks, so currently the whole notebook is very confusing)
some parts are duplicated (e.g. basic Trace intro in first notebook and in "waveform data" notebook, could use some refactoring)
The repo is huge. Currently around 400 MB. There is really no need to keep the full ObsPy history around especially since most documents do not even have a history in the first place.
Rebasing it in the right way would significantly reduce the size of the repository.