old_contents: //Import dependencies
  var fs = require('fs');
  var gulp = require('gulp');
  var concat = require('gulp-concat');
  var minify = require('gulp-minify-css');
  var rename = require('gulp-rename');
  var header = require('gulp-header');
  
  //Import the package
  var pkg = require('./package.json');
  var banner = ['/**',
    ' * <%= pkg.name %> - <%= pkg.description %>',
    ' * @version v<%= pkg.version %>',
    ' * @link <%= pkg.homepage %>',
    ' * @license <%= pkg.license %>',
    ' */',
    '', ''].join('\n');
  
  //Concat all files in css/src folder
  gulp.task('css-concat', function(){
  
    //Set the source files
    gulp.src('src/*.css')
  
    //Concat all files in siimple.css
    .pipe(concat('siimple.css'))
  
    //Add the header
    .pipe(header(banner, { pkg : pkg } ))
  
    //Save in css/ folder
    .pipe(gulp.dest('dist/'));
  
  });
  
  //Minimify the output file in siimple.min.css
  gulp.task('css-min', ['css-concat'], function(){
  
    //Set the source file
    gulp.src('dist/siimple.css')
  
    //MinifCss
    .pipe(minify())
  
    //Save the minifed file as siimple.min.css
    .pipe(rename('siimple.min.css'))
  
    //Add the header
    .pipe(header(banner, { pkg : pkg } ))
  
    //Save in css/ folder
    .pipe(gulp.dest('dist/'));
  
  });
  
  //Execute the tasks
  //First clean the output dir, then execute the css-concat task, last run the css-min
  gulp.task('default', ['css-min']);
  
new_contents: //Import dependencies
  var fs = require('fs');
  var gulp = require('gulp');
  var concat = require('gulp-concat');
  var minify = require('gulp-minify-css');
  var rename = require('gulp-rename');
  var header = require('gulp-header');
  var sass = require('gulp-sass');
  
  //Import the package
  var pkg = require('./package.json');
  
  //Header
  var banner = ['/**',
    ' * <%= pkg.name %> - <%= pkg.description %>',
    ' * @version v<%= pkg.version %>',
    ' * @link <%= pkg.homepage %>',
    ' * @license <%= pkg.license %>',
    ' */',
    '', ''].join('\n');
  
  //Build the SCSS files
  gulp.task('build', function(){
  
    //Select all the SCSS files
    gulp.src('src/**/*.scss')
  
    //Build
    .pipe(sass().on('error', sass.logError))
  
    //Add the header
    .pipe(header(banner, { pkg : pkg } ))
  
    //Save in the dist folder
    .pipe(gulp.dest('./dist/'));
  
  });
  
  //Minimize
  gulp.task('minimize', function(){
  
    //Set the source file
    gulp.src('dist/siimple.css')
  
    //MinifCss
    .pipe(minify())
  
    //Save as siimple.min.css
    .pipe(rename('siimple.min.css'))
  
    //Add the header
    .pipe(header(banner, { pkg : pkg } ))
  
    //Save in css/ folder
    .pipe(gulp.dest('dist/'));
  
  });
  
  //Execute the tasks
  gulp.task('default', ['build', 'minimize']);
  
subject: Add SASS/SCSS compiler