Remove hard reference to GFM since IPythonGFM uses CM require to load it.
update gh_api and github_stats for 2.1

- pull requests are marked with milestones
- get pull request authors for backports
add wheels to release

and ensure jsversion is in sync before making a release
What’s new for 2.1
forcefully hide CodeMirror scrollbars

workaround for CodeMirror issue 2562

less drastic but more gross alternative to #5889
Deleted additional highlightning from reveal, closes #5819 and #5907.
tiny refactor to nbconvert ansi filter

was looking at this code for another project, and was irked by what I
saw here, so just cleaned it up.
forgotten self
Merge pull request #5914 from Carreau/orgotten-self

forgotten self
fix a couple typos in Qt from the msg spec update

closes #5902
closes #5905
Merge pull request #5912 from ivanov/ansi-filter-ref

tiny refactor to nbconvert ansi filter
Merge pull request #5910 from damianavila/fix_highlight

Deleted additional highlightning from reveal, closes #5819 and #5907.
Merge pull request #5890 from minrk/cm-hscroll-bad

forcefully hide CodeMirror scrollbars
use shutil.move instead of os.rename

when moving config files
Change z-index of ipython_tooltip

I experienced the problem stated in #5755. Giving the ipython_tooltip class a higher z-index indeed solves the problem. I intentionally set it to a high value so it likelier remains on top when styles are changed in the future.
Merge pull request #5920 from yaph/patch-1

Change z-index of ipython_tooltip
Merge pull request #5916 from minrk/bad-source

fix a couple of typos in Qt
Merge pull request #5917 from minrk/shutil.move

use shutil.move instead of os.rename
load inputrc after IPython readline config

There is some subtlety, in that *user* IPython config should be higher priority than inputrc (more specific),
but *default* IPython config should be lower (less specific).

If readline config is customized, it will be allowed to run on libedit.
remove IPython.external.ssh

This code moved to zmq a while ago, let’s just depend on that.