BUG: pickling MemoizeFunc does not store timestamp
BUG: pickling MemoizeFunc does not store timestamp

Rather than using __getstate__ to override pickle, we use reduce, to
make sure that the __init__ is called at unpickle time, in order to
create the directory needed.

tomMoral/joblib,joblib/joblib,lesteve/joblib,aabadie/joblib,karandesai-96/joblib,joblib/joblib,lesteve/joblib,aabadie/joblib,karandesai-96/joblib,tomMoral/joblib