Specify that encoding for pcigale.ini. Otherwise if a non-ASCII character is...

Specify that encoding for pcigale.ini. Otherwise if a non-ASCII character is used it may work or crash depending on the computer. Now we encode everything in UTF-8, which will allow again to use these chracters in the description of the modules parameters.

pcigale/session/configuration.py

@@ -104,7 +104,8 @@ class Configuration(object):
         """
         self.config = configobj.ConfigObj(filename,
                                           write_empty_values=True,
-                                          indent_type='  ')
+                                          indent_type='  ',
+                                          encoding='UTF8')
 
     def create_blank_conf(self):
         """Create the initial configuration file