OTWO-3206: Use cvs test repositories as a tarball

This is to support filenames with invalid utf8 encoding in test
repositories. If the repository is not tarballed, the filenames would be
read by the rake task and throw an exception.
OTWO-3206: Fix invalid utf-8 encoding issues
OTWO-3218: Fix hung processes due to full io buffers
Merge pull request #16 from notalex/OTWO-3218

OTWO-3218: Fix hung processes due to full io buffers
Merge pull request #15 from notalex/OTWO-3206

Otwo 3206