release version 2.3.0

git-svn-id: https://plugins.svn.wordpress.org/ig-pagebuilder/trunk@915414 b8457f37-d9ea-0310-8a92-e5e31aec5664
release version 2.3.0 - remove redundant files

git-svn-id: https://plugins.svn.wordpress.org/ig-pagebuilder/trunk@915416 b8457f37-d9ea-0310-8a92-e5e31aec5664