All Javascript variables are jailed into $DGD namespace
Prevention for some JS dependencies 
Added: auto-close function, implemented auto-close after submission
Added: "close forever" 

git-svn-id: https://plugins.svn.wordpress.org/dreamgrow-scroll-triggered-box/trunk@1050332 b8457f37-d9ea-0310-8a92-e5e31aec5664