fix for amazon s3 and cloudfront .7

git-svn-id: https://plugins.svn.wordpress.org/ewww-image-optimizer/trunk@1045280 b8457f37-d9ea-0310-8a92-e5e31aec5664
tagging and releasing 2.1.2

git-svn-id: https://plugins.svn.wordpress.org/ewww-image-optimizer/trunk@1045281 b8457f37-d9ea-0310-8a92-e5e31aec5664