* Coding-style.

* This version no longer references empty strides beyond the d_ranges
  array end.
* It uses tables to enable multi-threaded index generation.

* This version will give a non-zero exit value if at least one file under
  version control lacks a copyright statement and is not on the list of
  exclusions from this check.

* Fix default kind of integer PRNG return values to i4.
* Fix type assumption in irand test.
* Fix type assumptions in combinatorics module.
* Also add 8 byte integer permutation.
* Declare integer weights in partitioning as i4.