LB-1394 Add grunt-contrib-less
LB-1394 Add less compilation to the build proccess
LB-1394 Exclude zeit less files from compilation
Merge pull request #65 from patriciagarcia/LB-1394

LB-1394 Add compilation of less files in grunt
LB-1515 Setup jscs and add grunt task

Fixed files with .jscsrc configuration.
Added gui-themes js file to be  checked.
Added to small md file on how to install jscs linter for sublime and
vim.