On transpilation, leave SASS files in lib/sass/
On transpilation, leave SASS files in lib/sass/

Fix #1238

ulrobix/ng-admin,marmelab/ng-admin,LuckeyHomes/ng-admin,marmelab/ng-admin,marmelab/ng-admin,LuckeyHomes/ng-admin,LuckeyHomes/ng-admin,ulrobix/ng-admin,ulrobix/ng-admin,eBoutik/ng-admin,eBoutik/ng-admin,eBoutik/ng-admin