[uglify-js/f20] (4 commits) ...Merge branch 'master' into f20

[Jamie Nguyen]

Summary of changes:

  bc3a398... Remove old sources
  31e6ed8... Remove old sources (*)
  b679f9b... Update to upstream release 2.4.13 (*)
  9494605... Merge branch 'master' into f20

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