bowerからいい感じにコピーとか結合をして、必要なファイルだけ持ってくる

Gruntfiles.coffee

grunt.initConfig
  concat:
    lib:
      files:
        'www/common/js/lib.js' : [
          'src/js/vendors/jquery/jquery.min.js'
          'src/js/vendors/modernizr/modernizr.js'
        ]
        'www/common/js/vendors/easeljs-0.6.0.min.js' : [
          'src/js/vendors/EaselJS-release_v0.6.0/lib/easeljs-0.6.0.min.js'
        ]

  copy:
    jslib:
      files: [
        {
          expand: true
          flatten: true
          cwd: 'src/js/vendors/'
          src: [
            'EaselJS-release_v0.6.0/lib/easeljs-0.6.0.min.js'
            'jquery/jquery.min.js'
          ]
          dest: 'www/common/js/vendors/'
        }
      ]