Update wp-tevko-responsive-images.php

You want to enqueue the script on the ‘wp_enqueue_scripts’ action instead of the ‘init’ action. See http://wordpress.stackexchange.com/questions/55924/when-to-use-add-actioninit-vs-add-actionwp-enqueue-scripts
Merge pull request #2 from kingkool68/master

Update wp-tevko-responsive-images.php