Merge pull request #481 from kyleam/rename-sample-module

Rename sample.py to sampling.py

Author: twiecki

pymc/__init__.py

@@ -5,7 +5,7 @@
 from .math import *
 
 from .trace import *
-from .sample import *
+from .sampling import *
 from .step_methods import *
 from .tuning import *