pep8 blank lines fixes

flake8 --select W391,E302,E301,E304

autopep8 can't fix W391 even though it claims it can.
Fixed using a simple custom script.

modules/marmiton/pages.py

@@ -26,6 +26,7 @@ from weboob.deprecated.browser import Page
 class ResultsPage(Page):
     """ Page which contains results as a list of recipies
     """
+
     def iter_recipes(self):
         for div in self.parser.select(self.document.getroot(), 'div.m_search_result'):
             tds = self.parser.select(div, 'td')
@@ -57,6 +58,7 @@ class ResultsPage(Page):
 class RecipePage(Page):
     """ Page which contains a recipe
     """
+
     def get_recipe(self, id):
         title = NotAvailable
         preparation_time = NotAvailable