changelog to version 1.2.5

git-svn-id: https://plugins.svn.wordpress.org/free-guest-post/trunk@858062 b8457f37-d9ea-0310-8a92-e5e31aec5664
bug: accidentally committed sandbox / test code

git-svn-id: https://plugins.svn.wordpress.org/free-guest-post/trunk@858067 b8457f37-d9ea-0310-8a92-e5e31aec5664
change version number

git-svn-id: https://plugins.svn.wordpress.org/free-guest-post/trunk@858068 b8457f37-d9ea-0310-8a92-e5e31aec5664