update version to 0.0.6
fix issues with cache whitelist
add options for cache whitelist

git-svn-id: https://plugins.svn.wordpress.org/next-level-cache/trunk@913051 b8457f37-d9ea-0310-8a92-e5e31aec5664
tested up to 3.9.1

git-svn-id: https://plugins.svn.wordpress.org/next-level-cache/trunk@913052 b8457f37-d9ea-0310-8a92-e5e31aec5664