delete readme.txt

git-svn-id: https://plugins.svn.wordpress.org/aw-yearly-category-archives/trunk@796639 b8457f37-d9ea-0310-8a92-e5e31aec5664
add updated readme.txt

git-svn-id: https://plugins.svn.wordpress.org/aw-yearly-category-archives/trunk@796640 b8457f37-d9ea-0310-8a92-e5e31aec5664