fixing-plugins: If the [data-autoplay] attribute is missing, do not run the autoplay _init funtion
Fixing an bug in the autoplay plugin where autoplay functionality will fire in the case where the  attribute is not on the element, the  function will return  and the conditional will evalute  because it only tests for not null and not false. The fix will will run autoplay in cases where the attribute is empty '', or set to anything except for 'false' (case-insensitive).
Cleanup