Revert "Fix #1539 - Update iPython 3.0.0 to 4.0.0"
This reverts commit 683596cb.
@aashish24 this should bring us back to ipython 3.0
ipython 4.0 appears
to work but when on lab networks it fails at load time because we need to bring in many many more silent
dependencies that pip auto-downloads (except inside the lab):MERGED: