Update CHANGES.txt

Update CHANGES.txt for v0.10.1

Fix heading length (python-visualization#1186)

Fix heading length

update changelog (python-visualization#1157)

update changelog

make all example data remote (python-visualization#1152)

make all example data remote

Merge pull request python-visualization#1097 from ocefpaf/bump_versio…

…n_nb

bump version number

re-run docs

re-run docs

Merge pull request python-visualization#1015 from ocefpaf/firefox_hea…

…dless

Use firefox headless instead of phantomjs

Merge pull request python-visualization#930 from ocefpaf/minor_cleanups

Minor cleanups