Tox: use git urls for py3 versions of smartypants and typogrify

+ This make it easier to use tox with py3: no need to checkout manually
  typogrify and smartypants repos and use tox's distshare.
+ Remove feedgenerator as it is already a dependy for pelican.

tox.ini

@@ -35,7 +35,6 @@ deps =
     mock
     Markdown
     BeautifulSoup4
-    feedgenerator
     typogrify
 
 [testenv:py32]
@@ -52,6 +51,5 @@ deps =
     mock
     Markdown
     BeautifulSoup4
-    feedgenerator
-#    {distshare}/smartypants-1.6.0.3.zip
-#    {distshare}/typogrify-2.0.0.zip
+    git+https://github.com/dmdm/smartypants.git#egg=smartypants
+    git+https://github.com/dmdm/typogrify.git@py3k#egg=typogrify