Optimizations for redraw performance

- automargin label redraw optimization

- effing copyright not changed to 2017 in ALL headers

Optimizations for label ellipsis and titles

v1.20.2-d30

tag 1.30 - Optimizations for title and label ellipsis

- Zoom related fixes

- 1.20.2-d29 tag

- misc fixes

v1.20.2-d28

- 1.20.2-d28 tag

- Added custom ION bundle

v1.20.2-d27

- updated changelog

Pie charts clicks

1.20.2-d26

- pie plots now propagate clicks

Aligned to 1.20.2

Merge tag 'v1.20.2'

1.20.2

Aligned to 1.20.1

- Aligned to 1.20.1

- Fixed: overrideColorDefaults should not assume that Plotly.Color is exported.

Mega-Merge form scratch

- Updated CHANGELOG.md

- Bumper version to 1.19-d24

Fix for new MouseEvent not supported in IE

v1.16.3-d22

- Fix for new MouseEvent not supported in IE