gulp.task('sass', function() {
return gulp.src('app/sass/**/*.{sass, scss}')
.pipe(sourcemaps.init())
.pipe(sass({
outputStyle: 'compact',
includePaths: ['node_modules/susy/sass']
}).on("error", notify.onError()))
.pipe(gcmq())
.pipe(autoprefixer(['last 15 versions', '> 1%', 'ie 8', 'ie 7'], { cascade: true }))
.pipe(sourcemaps.write('.'))
.pipe(gulp.dest('app/css'))
.pipe(browserSync.reload({stream: true}));
});