add annotsRoll class and create it in main. Adapt main and pianoroll to allow horizontal or vertical view
'use strict';
var gulp = require('gulp');
var jshint = require('gulp-jshint');
// JSHint
gulp.task('jshint', function () {
return gulp.src('app/js/**/*.js')
.pipe(jshint('.jshintrc'))
.pipe(jshint.reporter(require('jshint-stylish')));
});