[uglify-js1/f20] (3 commits) ...port to new JS guidelines

[T.C. Hollingsworth]

Summary of changes:

  dc01677... use new multi-version packaging rules (*)
  9eab568... add compat symlink so old modules continue to work (*)
  4171fd4... port to new JS guidelines (*)

(*) This commit already existed in another branch; no separate mail sent