Updated stable tag to version 1.2.25.

git-svn-id: https://plugins.svn.wordpress.org/rps-image-gallery/trunk@858039 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updated stable tag to version 1.2.26.

git-svn-id: https://plugins.svn.wordpress.org/rps-image-gallery/trunk@858592 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updated stable tag to 1.2.27.

git-svn-id: https://plugins.svn.wordpress.org/rps-image-gallery/trunk@860535 b8457f37-d9ea-0310-8a92-e5e31aec5664