Changed the version number.

git-svn-id: https://plugins.svn.wordpress.org/responsive-column-widgets/trunk@757462 b8457f37-d9ea-0310-8a92-e5e31aec5664
Marked 1.1.7.4 as stable.

git-svn-id: https://plugins.svn.wordpress.org/responsive-column-widgets/trunk@757464 b8457f37-d9ea-0310-8a92-e5e31aec5664