Changed format of exported CSV file.
Now has one column per post.  Puts date/time in cell if the user name (row) has read the post (column). Reordered function, leaning towards alphabetical.

git-svn-id: https://plugins.svn.wordpress.org/read-and-understood/trunk@1016372 b8457f37-d9ea-0310-8a92-e5e31aec5664
Added 1.4 POT files

git-svn-id: https://plugins.svn.wordpress.org/read-and-understood/trunk@1016373 b8457f37-d9ea-0310-8a92-e5e31aec5664