Add Cython to test dependencies.

Author: matthew-brett

.travis.yml

@@ -92,7 +92,8 @@ matrix:
 
 before_install:
     - BUILD_DEPENDS="numpy==$NP_BUILD_DEP Cython"
-    - TEST_DEPENDS="numpy==$NP_TEST_DEP nose"
+    # Tests need Cython because run_all.py wants to print out version
+    - TEST_DEPENDS="numpy==$NP_TEST_DEP nose Cython"
     - source multibuild/common_utils.sh
     - source multibuild/travis_steps.sh
     - before_install