尝试使用TowerJS作为测试设置基本站点，但是在运行脚手架生成器时遇到此错误。

Macbook:app john$ tower generate scaffold Post title:string body:text belongsTo:user
{ [Error: Cannot find module 'coffee-script'] code: 'MODULE_NOT_FOUND' }

module.js:340
    throw err;
          ^
Error: Cannot find module '/Users/john/Sites/tower/app/app/config/shared/application'
    at Function.Module._resolveFilename (module.js:338:15)
    at Function.Module._load (module.js:280:25)
    at Module.require (module.js:362:17)
    at require (module.js:378:17)
    at Function.Tower.Application.Application.reopenClass.instance (/usr/local/lib/node_modules/tower/lib/tower-application/server/application.js:42:15)
    at _.extend.namespace (/usr/local/lib/node_modules/tower/lib/tower-support/shared/shared.js:218:30)
    at GeneratorScaffoldGenerator.Tower.GeneratorResources.buildApp (/usr/local/lib/node_modules/tower/lib/tower-generator/server/resources.js:273:66)
    at GeneratorScaffoldGenerator.Generator (/usr/local/lib/node_modules/tower/lib/tower-generator/server/generator.js:57:23)
    at new GeneratorScaffoldGenerator (/usr/local/lib/node_modules/tower/lib/tower-generator/server/generators/tower/scaffold/scaffoldGenerator.js:21:61)
    at Function.run (/usr/local/lib/node_modules/tower/lib/tower-generator/server/generator.js:22:12)