Properly decode schrödinger’s (Fedora 19) release name

We need to read the file as UTF8 or we don't get a Python u'' string back but instead 'schr\xc3\xb6dinger\xe2\x80\x99s'; this is doomed to fail to match the key in the rosdep .yaml file, which is u'schr\xf6dinger\u2019s'.