Added optional caption slider to version 1.1.2

git-svn-id: https://plugins.svn.wordpress.org/instagram-slider-widget/trunk@915616 b8457f37-d9ea-0310-8a92-e5e31aec5664
version bump and changelog update

git-svn-id: https://plugins.svn.wordpress.org/instagram-slider-widget/trunk@915617 b8457f37-d9ea-0310-8a92-e5e31aec5664
version 1.1.2 added optional slider

git-svn-id: https://plugins.svn.wordpress.org/instagram-slider-widget/trunk@915619 b8457f37-d9ea-0310-8a92-e5e31aec5664
Slider Overlay upload 

git-svn-id: https://plugins.svn.wordpress.org/instagram-slider-widget/trunk@915621 b8457f37-d9ea-0310-8a92-e5e31aec5664
version 1.1.2 css update

git-svn-id: https://plugins.svn.wordpress.org/instagram-slider-widget/trunk@915622 b8457f37-d9ea-0310-8a92-e5e31aec5664