Merge pull request #627 from singingwolfboy/update-lxml

Update lxml and scipy

requirements/base.txt

@@ -27,4 +27,4 @@ South==0.7.6
 voluptuous==0.8.5
 
 # AI grading
-git+https://github.com/edx/ease.git@f9f47fb6b5c7c8b6c3360efa72eb56561e1a03b0#egg=ease
+git+https://github.com/edx/ease.git@bcb36e84b5ffa4ac00813577079dd6eef4fff566#egg=ease

requirements/wheels.txt

@@ -2,8 +2,8 @@
 # To speed up the test builds, we create binary "wheel" archives.
 # http://pip.readthedocs.org/en/latest/reference/pip_wheel.html
 
-lxml==3.0.1
+lxml==3.3.6
 nltk==2.0.4
 numpy==1.6.2
 scikit-learn==0.12.1
-scipy==0.11.0
+scipy==0.14.0