Fix weave import for Py3

GPy/kern/_src/coregionalize.py

@@ -3,11 +3,15 @@
 
 from .kern import Kern
 import numpy as np
-from scipy import weave
 from ...core.parameterization import Param
 from ...core.parameterization.transformations import Logexp
 from ...util.config import config # for assesing whether to use weave
 
+try:
+    from scipy import weave
+except ImportError:
+    config.set('weave', 'working', 'False')
+
 class Coregionalize(Kern):
     """
     Covariance function for intrinsic/linear coregionalization models