Easy spacing fixes, trailing stuff

Remove useless trailing \
Remove trailing spaces
Add missing empty lines

autopep8 -ir -j2 --select=E301,E302,E502,W291,W293,W391 .

Diff quickly checked.

weboob/tools/application/base.py

@@ -64,6 +64,7 @@ class ApplicationStorage(object):
         if self.storage:
             return self.storage.save('applications', self.name)
 
+
 class BaseApplication(object):
     """
     Base application.