Minor bugfix release to address a number of issues that weren't caught in time for the 1.3.0 release with the addition of a small number of features:
Features:
Introduced new Spread element to plot errors and confidence intervals (30d3184).
ErrorBars and Spread elements now allow most Chart constructor types (f013deb).
Bug fixes:
Fixed unicode handling for dimension labels (061e9af).
Handling of invalid dimension label characters in widgets (a101b9e).
Fixed setting of fps option for MPLRenderer video output (c61b9df).
Fix for multiple and animated colorbars (5e1e4b5).
Fix to Chart slices starting or ending at zero (edd0039).