Allow parameters to be fixed at kernel creation time.

See merge request !141

Among other things, passing fixed parameters can improve the accuracy
of temp shape inference, so that fallback can occur less often.

The motivation for this is to remove the temp_shape_fallback warnings
when constructing sumpy kernels.

Lazy data structures

See merge request !139

Adjust the recursionlimit for complexity in number of inames

Closes #78

See merge request !136

This changes implements a LazyList and
LazyListWithEqAndPersistentHashing data structure. These data
structures lazily unpickle their contents.

This change also renames LazilyUnpicklingDictionary to LazyDict.

Fix single-trip check in sequential loop generation (Fixes #87 on gitlab)

Closes #87

See merge request !137

So far, only complexity in number of instructions was taken into
account. The constant is just a guess that fixes the test kernel
that introduced the failure.

Fix recognition of striding constraints in counting when other, unused divs are present

See merge request !132

Check no_sync_with attribute in check_insn_attributes()

Closes #55

See merge request !131

Closes #55

Make a way to spell literal local barriers

See merge request !130

Remove numpy dtypes from ArgExtFunction and SegmentedFunction

Closes #80

See merge request !124

Fix a 'threw StopIteration' warning in get_priority_tiers

See merge request !129