remove explicit invocation of ur in python2, rely on unicode_literals
remove explicit invocation of ur in python2, rely on unicode_literals

sbenthall/scipy_proceedings,sbenthall/scipy_proceedings,katyhuff/scipy_proceedings,katyhuff/scipy_proceedings,michaelpacer/scipy_proceedings,katyhuff/scipy_proceedings,michaelpacer/scipy_proceedings,michaelpacer/scipy_proceedings,sbenthall/scipy_proceedings