// Sass compilation
gulp.task('sass', function() {
    gulp.src('source/scss/*.scss')
        .pipe(sass().on('error', gutil.log))
        .pipe(prefixer('last 10 versions'))
        .pipe(gulp.dest('public/css')) // Output non-min version
        .pipe(minifycss())
        .pipe(rename({suffix:'.min'}))
        .pipe(gulp.dest('public/css'))
        .pipe(livereload(server));
});