Merge pull request #6296 from notoraptor/fix-requirement-rtd

requirement-rtd.txt

 sphinx>=1.3.0
 pygments
 nose>=1.3.0
+numpy
+gnumpy
+pydot
+pydot2
+Cython
 parameterized
 scipy==0.13
--e . --install-option="--no-deps"
+
+