v1.15.0

Added

• Add Plotly.validate method [#697]
• Add support for transforms plugins modules [#499]
• Some partial bundles are now distributed in dist/ [#740]
• Mapbox access token can now be set in layout.mapbox [#729]
• Undo/Redo queue length is now configurable via configuration option
  queueLength [#737]

Changed

• Improve performance in gl2d request animation frame loop [#731]
• Improve Lib.extendDeep performance for primitive arrays [#732]
• Improve potential XSS input in text fields [#736]
• Improve scaling on scroll zoom for scatter lines and markers [#761, #762]

Fixed

• toImage pixel output for gl2d graphs are now scaled properly [#735]
• scattermapbox marker size and color arrays are now correctly converted when
  they include repeated values [#747]
• Fix scatter3d marker line color inheritance [#754]
• text fields can now support link with query params = and & [#736]
• Fix Chrome 50 bug where tester svg blocked other DOM nodes [#745]