Pytests: Used pip for pytest installation because python-pytest is not available on pure precise, lucid and rhel 5/6.
Merge branch 'master' of github.com:reverbrain/elliptics into pytests
Pytests: fixed runtime property in cocaine config.
Pytests: used virtualenv for installing and runnig pytest.
Pytests: added dependency from python-virtualenv.
Pytests: removed exception strings from checking because they depend on the boost python version.
Merge pull request #384 from shaitan/pytests

Pytests: Used pip for pytest installation