Fix IPython detection.  Fix encoding error on Python 3
Remove _in_ipython
counterclock parameter for pie
fix style restriction failure
change description
add description in changelog
Merge branch 'fat-crocodile-counterclock'

Conflicts:
	doc/api/api_changes.rst

fixed conflict in api_changes.rst
Merge pull request #2834 from mdboom/webagg/ipython-detection

WebAgg: Fix IPython detection.  Fix encoding error on Python 3