Fix notices

git-svn-id: https://plugins.svn.wordpress.org/ml-slider/trunk@869735 b8457f37-d9ea-0310-8a92-e5e31aec5664
Add z-index to metaslider, try and fix drop down menu issues

git-svn-id: https://plugins.svn.wordpress.org/ml-slider/trunk@869737 b8457f37-d9ea-0310-8a92-e5e31aec5664
Consider smart crop dimensions before returning image URL

git-svn-id: https://plugins.svn.wordpress.org/ml-slider/trunk@869738 b8457f37-d9ea-0310-8a92-e5e31aec5664
Croatian lang packs added

git-svn-id: https://plugins.svn.wordpress.org/ml-slider/trunk@869742 b8457f37-d9ea-0310-8a92-e5e31aec5664