* Tested up to WordPress 4.0
* Added Containing Element option: Confine invaders to a specific page element
* Added Z-index support: Configure invaders z-index for layering in document
* Updated Admin screen
* Updated ReadMe
* Updated Spritely version

git-svn-id: https://plugins.svn.wordpress.org/jellyfish-invaders/trunk@1005532 b8457f37-d9ea-0310-8a92-e5e31aec5664