updating the README file

related #48
updating the change log for 2.4
Updated to `readme.txt` to be up to standard with the current WordPress Plugin Repository demo

Fixes #50
adding example.com to the plugin-name page-level docblock

related #48
updating page-level docblocks to be consistent

related #48
continuing to update all page-level docblocks for consistency

related #48
adding notes for the new tag
updating the docblock in the class
updating the docblock for this class
Merge pull request #3 from tommcfarlin/master

Update 16.05.2013