Release 4.8.0

New features/Improvements

• Refactor DataPrinter to add _build_text_from_event method (PR #450)
• Simplify controlling text of ImageInspectorOverlay (PR #431)
• 2D segment and text scatter plot types (PR #407)
• Set up Windows testing under AppVeyor (PR #445)
• Add option for aligning label in index direction in TextPlot1D (PR #430)

Fixes

• Fix a test that fails with NumPy 1.16.x (PR #471)
• Fix missing imports of SegmentPlot and TextPlot (PR #470)
• Fix circular imports in toolbar_plot, transform_color_mapper (PR #469)
• Fix deprecated logger.warn uses (PR #458)
• Fix DataBox resizing bug (PR #456)
• Do not render quiver if there is no point (PR #424)
• Use single comma-separated trait names in on_trait_change, not multiple
  arguments (PR #397)

Documentation/examples

• Add documentation for some tools (PR #451)
• Remove erroneous label_rotation comment (PR #447)
• Add scatter inspector example (PR #434)
• Fix float indices in Spectrum demo (PR #427)
• Fix world_map demo (PR #423)
• Fix up create_plot_snapshots script (PR #421)
• Docstring for ArrayPlotData.{set_data,update_data} (PR #399)

Maintenance

• Fix test that fails with Numpy 1.16 (PR #471)
• Update Travis CI configuration to be compatible with Ubuntu Xenial (PR #452)
• Update unittest imports (PR #446)
• Address DeprecationWarnings (PR #441)
• Use unittest-style tests (PR #440)
• Run testsuite on macOS and Python 3.6 (PR #442)
• Use standard Sphinx extensions for trait documenting (PR #436)
• Update Cython generated code to support Python 3.7 (PR #433)
• Skip DataFramePlotData tests if Pandas not installed (PR #422)