Log Message:
Update to 0.49

Upstream changes:
0.38 Thu Sep  5 21:09:10 EDT 2013
    - Update support information; no longer using dedicated mailing list.

0.39 Fri Jul  4 15:38:24 EDT 2014
    - Repository migrated from Subversion to git.  Development repository
      initiated at https://github.com/jkeenan/list-compare.

0.40 Sat Feb  7 08:39:06 EST 2015
    - Eliminated three unnecessary hash assignments.

0.41 Sun Feb  8 20:38:46 EST 2015
    - Revised List::Compare::Functional::_intersection_engine() to eliminate
      need to call _calculate_xintersection_only() and
      _calculate_hash_intersection();

0.42 Wed Feb 11 20:57:43 EST 2015
    - Improve performance of four List::Compare::Functional functions.

      get_nonintersection
      get_nonintersection_ref
      get_symmetric_difference
      get_symmetric_difference_ref

0.43 Thu Feb 12 19:14:35 EST 2015
    - Improve performance of two List::Compare::Functional functions.

      get_shared
      get_shared_ref

0.44 Sun Feb 15 14:40:06 EST 2015
    - Improve performance of complement-related functions in both functional
      and object-oriented interfaces:

      get_complement
      get_complement_ref
      get_complement_all

0.45 Mon Feb 16 16:59:03 EST 2015
    - Improve performance of unique-related functions in both functional and
      object-oriented interfaces:

      get_unique
      get_unique_ref
      get_unique_all

0.46 Wed Feb 18 19:30:30 EST 2015
    - Improve performance of List::Compare::Multiple::Accelerated methods:

      get_intersection
      get_intersection_ref
      get_shared
      get_shared_ref

0.47 Sun Feb 22 08:17:54 EST 2015
    - Improve performance of List::Compare::Multiple::Accelerated methods:

      get_nonintersection
      get_nonintersection_ref
      get_symmetric_difference
      get_symmetric_difference_ref

0.48 Wed Feb 25 17:59:30 EST 2015
    - Improve performance of is_LdisjointR in List::Compare::Functional and in
      multiple accelerated mode of List::Compare.

0.49 Sun Mar  8 20:06:20 EDT 2015
    - Add metadata to Makefile.PL.