[golang/f20] (3 commits) ...Merge branch 'master' into f20

[Vincent Batts]

Summary of changes:

  5152b3a... removing the elliptic.P224 curve bz1038683 (*)
  b5cbd1e... remove godoc dependency (*)
  ea5e86c... Merge branch 'master' into f20

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