Update less-1.4.0.js

modern minifyers (web essentials for visual studio e.g.) using "important comment notation" to keep credits in minifyed version and in the same time release the developer from the burden of having to always update two files.. normal and minifyed. Please take a look a jQuery e.g.:
/*! jQuery v2.0.0 | (c) 2005, 2013 jQuery Foundation, Inc. | jquery.org/license
//@ sourceMappingURL=jquery.min.map
*/
Consider that one-line pattern. Cheers, Max