tree-differ:
- export both TreeDiffer and DiffResult interface
diffing-broccoli-plugin:
- factory class for wrapping DiffingBroccoliPlugins and turning them into BroccoliTrees
broccoli-dest-copy:
- refactor into DiffingBroccoliPlugin
broccoli-traceur:
- refactor into DiffingBroccoliPlugin
This removes .es6 files which are pure duplicates of a
.ts file in the same folder.
Next we need to remove .js files as well, and remove karma preprocessors for dart.