[FIX] fixed dependency on pandas

    using the currently released pandas 0.13 leads to installation
    problems. added fixed dependency to pandas 0.12.0 to setup.py
Merge branch 'master' of github.com:uweschmitt/pyprophet
[RELEASE] v 0.9.2
Merge branch 'master' of github.com:uweschmitt/pyprophet
[CLEANUP]
[RELEASE] v 0.10.0