PEP8 style fixes and other small style fixes

I used autopep8 on some files and did carefully check the changes.
I ignored E501,E302,E231,E225,E222,E221,E241,E203 in my search, and at
least E501 on any autopep8 run.

Other style fixes not related to PEP8:
* Only use new-style classes. I don't think the usage of old-style
  classes was voluntary. Old-style classes are removed in Python 3.
* Convert an if/else to a one-liner in mediawiki, change docstring style
  change to a comment something that wasn't really appropriate for a
  docstring.
* Unneeded first if condition in meteofrance

weboob/capabilities/base.py

@@ -64,6 +64,7 @@ class NotLoaded(object):
 class IBaseCap(object):
     pass
 
+
 class CapBaseObject(object):
     FIELDS = None
     _attribs = None
@@ -128,7 +129,7 @@ class CapBaseObject(object):
         if self.FIELDS is None:
             yield 'id', self.id
             for key, value in iter_fields(self):
-                if key not in ('id', 'backend','FIELDS'):
+                if key not in ('id', 'backend', 'FIELDS'):
                     yield key, value
         else:
             yield 'id', self.id