I've added a couple of fixes to remove warnings and errors with the latest Dart build.
I've removed the vendor and gitmodules and added a pubspec pointing at DartMixins.
I've kept the relative #import("packages/DartMixins/Mixin.dart") instead of #import("packages:DartMixins/Mixin.dart") to keep the editor happy.
I've added a couple of fixes to remove warnings and errors with the latest Dart build. I've removed the vendor and gitmodules and added a pubspec pointing at DartMixins. I've kept the relative #import("packages/DartMixins/Mixin.dart") instead of #import("packages:DartMixins/Mixin.dart") to keep the editor happy.