Updated readme.txt file.

git-svn-id: https://plugins.svn.wordpress.org/simple-fullscreen-responsive-slider/trunk@991290 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updated to 1.0.3

git-svn-id: https://plugins.svn.wordpress.org/simple-fullscreen-responsive-slider/trunk@991293 b8457f37-d9ea-0310-8a92-e5e31aec5664