Change url for django-pipeline

* old read-only url times out for some reason (possible github bug)
* https seems to work.
* worry: does https only work for people with write access to repo?

requirements.txt

@@ -10,10 +10,10 @@ mako
 python-memcached
 path.py
 django_debug_toolbar
--e git://github.com/MITx/django-pipeline.git#egg=django-pipeline
+-e git+https://github.com/MITx/django-pipeline.git#egg=django-pipeline
 django-staticfiles>=1.2.1
 fs
-beautifulsoup 
+beautifulsoup
 beautifulsoup4
 feedparser
 requests