Added Tarunk to readme

git-svn-id: https://plugins.svn.wordpress.org/wp-backitup/trunk@791792 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updated trunk to version 1.5.0

git-svn-id: https://plugins.svn.wordpress.org/wp-backitup/trunk@792575 b8457f37-d9ea-0310-8a92-e5e31aec5664
Tagging version 1.5.1

git-svn-id: https://plugins.svn.wordpress.org/wp-backitup/trunk@792911 b8457f37-d9ea-0310-8a92-e5e31aec5664
Version 1.5.2

git-svn-id: https://plugins.svn.wordpress.org/wp-backitup/trunk@794066 b8457f37-d9ea-0310-8a92-e5e31aec5664