fix bin/lessc to work with relative and absolute paths
fix bin/lessc to work with relative and absolute paths

gravitystorm/carto,1ec5/carto,whitelynx/carto,clhenrick/carto,stefanklug/carto,tomhughes/carto,mapbox/carto,madeinqc/carto,midnightcomm/carto,CartoDB/carto,pnorman/carto,CartoDB/carto