API: Allow NotebookManagers to control kernel startup dir. #5468
Add git-hooks install script. Update README.md
disambiguate to location when no IPs can be determined

previously, fallback was to localhost, which could often be wrong.
update header in parallel.util
Fixed fontsize issue and added missing require and jquery from cdn.
fix required Python versions
Merge pull request #5489 from Xaerxess/patch-1

Fix required Python versions
fix minor bugs in export as (nbconvert) example
Update Export As (nbconvert).ipynb
Polish whatsnew docs
Remove link to nonexistent doc
Disambiguate conflicting label
Fix example inclusions in docs
Exclude whatsnew/pr directory from docs builds

Silences a couple of annoying Sphinx warnings.
Merge pull request #5496 from takluyver/docs-dont-build-pr

Exclude whatsnew/pr directory from docs builds
Remove the octavemagic extension.

It is part of oct2py, so we can stop testing and documenting it now.
Merge pull request #5495 from takluyver/docs-fixing-broken-stuff

Fix various broken things in docs
use milestones to indicate backport
Merge pull request #5492 from takluyver/whatsnew-2-cleanup

Polish whatsnew docs
Merge pull request #5498 from minrk/backport-milestones

use milestones to indicate backport