Add Transform.AnyBy.
Add Transforms.Compact.
Refactor Transform base-classes

  - Make Grunt build in the correct order.
  - mv FilterMixin to mixins/
  - mv ReduceMixin to mixins/
  - convert Transform to TransformByMixin and mv to mixins/
  - convert TransformBy to TransformByMixin and mv to mixins/
wip; up to find.