Add Less (CSS) syntax checker
Add Less (CSS) syntax checker

Use lessc built-in linter

datanoise/neomake,bonds/neomake,KariusDx/neomake,euclio/neomake,neomake/neomake,nerdrew/neomake,euclio/neomake,nerdrew/neomake,codeinabox/neomake,bonds/neomake,neomake/neomake