Unicode names cause problems

There are a number of places that do not properly handle non-ASCII data:

 * The TVRage plugin does not decode page data;
 * The templates (both from plugin defaults and from the command line) are not decoded properly;
 * The logging code assumes ASCII data, passing Unicode data results in an error.

  File "Renamer/trunk/renamer/plugin.py", line 165, in buildDestination
    filename = nameTemplate.safe_substitute(mapping)
  File "/usr/local/lib/python2.7/string.py", line 205, in safe_substitute
    return self.pattern.sub(convert, self.template)
exceptions.UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 1: ordinal not in range(128)