Updated less to 1.4.2 from https://raw.github.com/less/less.js/master/dist/less-1.4.2.min.js
Updated less to 1.5.0 from https://raw.github.com/less/less.js/master/dist/less-1.5.0.min.js
Merge pull request #2118 from mnjul/master

Update less.js to 1.5.0