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'`.