Update section description

Update section description to include new functionality.
Remove WordPress default Author meta box

Removes the WordPress default Author meta box from the specified Edit
areas. In this instance, Edit Post and Edit Page.
Changed displayed meta box title

Changed the displayed meta box title to match the WordPress default
Author meta box that is removed.
Fixed description

Updated the description for the hook action to better reflect the
functionality of the hook.
Switched meta storage to array

Switched the storage of author meta data from separate database entries
to a single entry inside an array. Sets the plugin up for better future
backward compatibility.