Housekeeping

A few hopefully controversy free housekeeping commits.  Please let me know if you prefer different wording, or want me to use different names, etc.

 1. I noticed a POD error in the documentation and took the opportunity to add new contributors
 2. Include a LICENSE file that specifies the License
 3. Updated the MANIFEST file
 4. Updated Changes to reflect the new features / bug fixes that have been added recently.