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/mailinator/browser.py

@@ -65,8 +65,10 @@ class MailinatorBrowser(Browser):
         divs = doc.cssselect('.mailview')
         return divs[0].text_content().strip()
 
+
 def millis():
     return int(time.time() * 1000)
 
+
 def frommillis(millis):
     return datetime.fromtimestamp(millis / 1000)