[python3/nightly] (9 commits) ...Merge branch 'master' into nightly

[Miro Hrončok]

Summary of changes:

  95668bd... Add explanation of the bootstraping process (*)
  1014fca... Change paths to bundled projects in rewheel patch (*)
  cb99f9f... bump release and rebuild to link with the correct tcl/tk li (*)
  a292e5b... - Rebuilt for https://fedoraproject.org/wiki/Fedora_21_Mass (*)
  9012997... aarch64 has valgrind, just list those that don't support it (*)
  95a5593... Rewrite the config wrapper from Bash to Python, so it can b (*)
  41a6830... Header of config script improval (*)
  8430e60... Back to Bash wrapper, as upstream in 3.4 also uses Bash for (*)
  d9f0c43... Merge branch 'master' into nightly

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