This function does trivial things, but it's there to solve the problem
that the reduction neutral element getters are not allowed to store
dtypes (#80).

The function mangler demands that a function knows its type based on
its arguments. For the neutral element getters, this is impossible
because they take zero arguments. The simplest fix I can think of is
to change a call to neutral_element() to a call to make_tuple().

Currently, the tuple code doesn't work yet due to pickling issues.  I
think the root cause is somewhere in
__hackily_ensure_multi_argument_functions_are_scoped_private().

Minor fixes

See merge request !123

Preserve TaggedVariable in ExpressionToCExpressionMapper.map_subscripts

See merge request !120

So far, this handler silently dropped any tags on the aggregate,
which is an undesired behaviour if the tag is to be used in the
code generation step.

fixed an issue when trace_assignment_values=True

Cache improvements

See merge request !117

Fix domain tree branch detection

See merge request !115

Improve save and reload towards global scan (see: #62).

Closes #40 and #54

See merge request !106

get_usable_inames_for_conditional(): Fix inames finding in the case

Closes #65

See merge request !112

Conflicts:
	test/test_loopy.py

containing subkernel. Rename prev_sched_index to sched_item_index. Fix
a case where the loop would exit too late.

_UniqueVarNameGenerator: Fix O(n**2) behavior by keeping track of the

Closes #25

See merge request !111

get included in dependency calculcations.

Add a save and reload test that uses base_storage.

that we are outside a subkernel (closes #65).