Allow usage of In in new theano functions

theano/compile/function.py

@@ -280,7 +280,7 @@ def function(inputs, outputs=None, mode=None, updates=None, givens=None,
                                    (hasattr(i, 'mutable') and i.mutable))):
             check_for_aliased_inputs = True
 
-    if uses_In or uses_tuple:
+    if uses_tuple:
         # we must use old semantics in this case.
         if profile:
             raise NotImplementedError("profiling not supported in old-style "

theano/compile/pfunc.py

@@ -526,6 +526,8 @@ def _pfunc_param_to_in(param, strict=False, allow_downcast=None):
             borrow=param.borrow,
             allow_downcast=param.allow_downcast,
             implicit=param.implicit)
+    elif isinstance(param, In):
+        return param
     raise TypeError('Unknown parameter type: %s' % type(param))