Correctly do version comparison: fix #136

theano/sandbox/linalg/tests/test_linalg.py

+from pkg_resources import parse_version as V
+
 import numpy
 
 import theano
@@ -6,7 +8,7 @@ from theano.tensor.basic import _allclose
 
 try:
     import scipy
-    if scipy.__version__ < '0.7':
+    if V(scipy.__version__) < V('0.7'):
         raise ImportError()
     use_scipy = True
 except ImportError:

theano/sparse/__init__.py

+from pkg_resources import parse_version as V
 import sys
+
 try:
     import scipy
-    enable_sparse = scipy.__version__ >= '0.7'
+    enable_sparse = V(scipy.__version__) >= V('0.7')
+
     if not enable_sparse:
         sys.stderr.write("WARNING: scipy version = %s."
                 " We request version >=0.7.0 for the sparse code as it has"