1.6 =
* Added functionality originally intended for Version 1.4
* Changed format of exported CSV file. It now has one column per post. 
* Optionally, allows export of CSV in "old" format (option to be retired 11/1/2015) 
* Puts date/time in cell if the user name (row) has read the post (column).
* Optionally, exports WordPress Users even if they had not acknowledged a post in the time frame.

git-svn-id: https://plugins.svn.wordpress.org/read-and-understood/trunk@1038177 b8457f37-d9ea-0310-8a92-e5e31aec5664