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

modules/ehentai/browser.py

@@ -61,7 +61,7 @@ class EHentaiBrowser(BaseBrowser):
         assert self.is_on_page(GalleryPage)
         i = 0
         while True:
-            n = self.page._next_page_link();
+            n = self.page._next_page_link()
 
             for img in self.page.image_pages():
                 yield EHentaiImage(img)
@@ -104,4 +104,3 @@ class EHentaiBrowser(BaseBrowser):
 
         # necessary in order to reach the fjords
         self.home()
-