added decorator to silence errors

GPy/util/__init__.py

@@ -10,3 +10,4 @@ import Tango
 import misc
 import warping_functions
 import datasets
+import decorators

GPy/util/decorators.py

@@ -0,0 +1,10 @@
+import numpy as np
+from functools import wraps
+
+def silence_errors(f):
+    status = np.seterr(all='ignore')
+    @wraps(f)
+    def wrapper(*args, **kwds):
+        return f(*args, **kwds)
+    np.seterr(**status)
+    return wrapper