[install-guide] (3 commits) ...Merge branch 'f21-branch' of ssh://git.fedorahosted.org/git/docs/install-guide into f21-branch

[pbokoc]

Summary of changes:

  dce8911... some people have arch questions (*)
  e611d1f... Add Anaconda help content placeholders (*)
  e5173e8... Merge branch 'f21-branch' of ssh://git.fedorahosted.org/git (*)

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