Gruntfile configuration to copy images from bower_components into dist/styles/images (see http://stackoverflow.com/a/16973048/376366)

Gruntfile.js

    imagemin: {
      dist: {
        files: [{
          expand: true,
          cwd: '<%= yeoman.app %>/images',
          src: '{,*/}*.{gif,jpeg,jpg,png}',
          dest: '<%= yeoman.dist %>/images'
        }, {
          expand : true,
          flatten : true,
          cwd : '<%= yeoman.app %>/bower_components',
          src : '**/*.{png,jpg,jpeg,gif}',
          dest : '<%= yeoman.dist %>/styles/images'
        }]
      }
    },