//scss / autoprefixer
gulp.task('scss', function(){
    gulp.src(paths.styles.src)
        .pipe(sass())
        .pipe(rename('all.css'))
        .pipe(gulp.dest(paths.styles.dest));
});
gulp.task('autoprefixer', function(){
    gulp.src(paths.styles.dest + 'all.css')
        .pipe(autoprefixer({
            browsers: ['last 2 versions']
        }))
        .pipe(gulp.dest(paths.styles.dest));
});