type. Now, the argument to a reduction can be either a scalar or a
tuple.

This reverts commit 7913e68a.

Conflicts:
	loopy/transform/iname.py
	test/test_loopy.py

either a tuple, reduction, or a substitution invocation).

Also, rewrite the reduction mapping code to rely on recursive calls
map_tuple(). This cleans up a lot of reduction mapping code
substantially.

# Conflicts:
#   loopy/transform/iname.py

* Eliminates inames arguments to reduction functions (closes #32).
* Changes the argmax function to accept two arguments.

See also: #62

Fix update_persistent_hash for CallInstruction with predicates (Closes #58 on gitlab)

Closes #58

See merge request !99

Silence unmatched dep error

See merge request !98

defaults to True. If set, any unmatched instruction
dependency will issue an error.

Test, fix assignments to struct components (reported by Fred Burton)

See merge request !96

Fix parallel reduction for size 1

Closes #44

See merge request !94

Add simplify_pw_aff to generate simpler loop bounds

See merge request !92

Fix parallel multi-output reduction (Fixes #31 on Gitlab)

Closes #31

See merge request !91

Lazily unpickling dictionary

Closes #29

See merge request !89