We can build Fitness again now that playfair has been updated to account for
the package:flutter rename.

Add a bin/flutter.dart to the flutter package

This command will eventually become the main entrypoint for the Flutter tools.
Also, fixup a reference to the "sky" package in sky_tool.

Import dart:ui as ui (instead of as sky)

Flutterize

Check if invocation of a closure failed due to a compilation error

Rename skyx to flx in sky.

Painting images should not anti-alias (improves performance)

This is needed for coordination with sky_tools development.

Adds debug drawing for weld joints in sprite physics

Make it fast to draw color icons

Avoid painting previous routes redundantly

Instead of using a ColorFilter, plumb the information down to Icon and thereby
to Image.

...once the animation is done.

Update dart revision

Avoid displaying too many markers when the frame time exceeds the available time by a large amount

Remove workarounds that avoided 'super' in mixins

Dart supports this properly now.

Add a flag to TextPainter to use ParagraphBuilder

This patch makes it easier to experiment with work on ParagraphBuilder.

Remove circular imports of the material.dart library

Rename App to MaterialApp

MaterialApp assumes that you're using material design.

Also move radial reaction and fix imports for stats box.