Change default value of reoptimize_unpickled_function

doc/library/config.txt

@@ -767,7 +767,7 @@ import theano and print the config variable, as in:
 
 .. attribute:: reoptimize_unpickled_function
 
-    Bool value, default: True
+    Bool value, default: False (changed in master after Theano 0.7 release)
 
     Theano users can use the standard python pickle tools to save a compiled
     theano function. When pickling, both graph before and after the optimization

theano/configdefaults.py

@@ -535,7 +535,7 @@ AddConfigVar('unpickle_function',
 AddConfigVar(
     'reoptimize_unpickled_function',
     "Re-optimize the graph when a theano function is unpickled from the disk.",
-    BoolParam(True, allow_override=True),
+    BoolParam(False, allow_override=True),
     in_c_key=False)