Merge pull request #1 from nouiz/ebuchman-chi2sf/master

Finish chi2 tests and GPU code.

Merge pull request #1 from nouiz/ebuchman-chi2sf/master
426686fe · ebuchman · 08d16c0a · 914eb1be · 426686fe · 426686fe
--- a/theano/scalar/basic_scipy.py
+++ b/theano/scalar/basic_scipy.py
--- a/theano/tensor/tests/test_basic.py
+++ b/theano/tensor/tests/test_basic.py