Updated compatibility up to version 3.8.1

git-svn-id: https://plugins.svn.wordpress.org/dialective/trunk@858997 b8457f37-d9ea-0310-8a92-e5e31aec5664
Add height calculator from width

git-svn-id: https://plugins.svn.wordpress.org/dialective/trunk@859085 b8457f37-d9ea-0310-8a92-e5e31aec5664
Add height calculator from width

git-svn-id: https://plugins.svn.wordpress.org/dialective/trunk@859095 b8457f37-d9ea-0310-8a92-e5e31aec5664