Untag some examples
Let's untag only something in Array instead
More Array's examples untagged or retagged
Explicitly list failing specs of Array#{to_s,join}
List failing specs of Hash#== and Hash.[]
Nightly releases should contain lib-topaz directory
Fix extension of tarballs with nightly releases

From what we can see in topaz/tools/make_release.py they are bzip2'ed.
Merge pull request #436 from jstepien/untagging

Untag some examples
Merge pull request #438 from jstepien/fix-nightly-builds

Fix nightly builds