Update tmp/*.csv and tmp/README.md

Add link to CSV files in the tmp/README.md file.

Rename CSV files to better reflect their contents.

Update header in each CSV file to better reflect the contents.

tmp/README.md

@@ -3,3 +3,8 @@ This tmp directory will go away.
 The purpose of this directory is to hold temporary files.
 
 For example: CVS text files, that will later be used to generate JSON files.
+
+The files currently available (as of 08 April 2023, added 07 April):
+
+- [year-auth-prize.csv](year-auth-prize.csv) - list of winning entries by author, year and prize
+- [winners.csv](winners.csv) - list of winning authors