Release Name: 1.0.5

Notes:
* License changed to Artistic 2.0
* Some gemspec updates


Changes:
* Changed license to Artistic 2.0.
* Added a build_binary_gem task.
* Cleaned up and refactored the gemspec a bit, including the addition of
  a license and an updated description.
* Switched test-unit from a runtime dependency to a dev dependency.