title: Meteor Session is not defined
body: <p>when I run my meteor project, this problem occurred:</p>
  
  <pre><code>ReferenceError: Session is not defined
  at app/_components/talk/views/friends_list.coffee.js:1:16
  at /home/xyz/web/edp/.meteor/local/build/server/server.js:298:12
  at Array.forEach (native)
  at Function._.each._.forEach (/home/xyz/.meteorite/meteors/meteor/
      meteor/9bb2b5447e845c4f483df5e9b42a2c1de5ab909b/
      dev_bundle/lib/node_modules/underscore/underscore.js:78:11)
  </code></pre>
  
  <p>here is my directory structure (I have changed the name of the files):</p>
  
  <pre><code>├── _components
  │   ├── project_form
  │   │   └── client
  │   │       ├── lib
  │   │       │   └── ...
  │   │       ├── project_info
  │   │       │   ├── x1.coffee
  │   │       │   ├── x2.html
  │   │       │   ├── x3.coffee
  │   │       │   └── x4.html
  │   │       └── views
  │   │           ├── x5.coffee
  │   │           └── x6.html
  │   ├── README.md
  │   └── talk
  │       └── client
  │             ├── x7.coffee
  │             ├── x8.html
  │             ├── x9.coffee
  │             ├── x10.html
  │             ├── x11.coffee
  │             ├── x12.html
  │             ├── x13.coffee
  │             ├── x14.html
  │             └── x15.less
  </code></pre>
  
  <p>If I change the directory structure to the following, 
  meteor runs correctly.I really don't know why, how could it happened?
  I think the file loading order may make a difference to it.
  But I can't figure it out.</p>
  
  <pre><code>├── _components
  │   ├── project_form
  │   │   └── client
  │   │       ├── lib
  │   │       │   └── ...
  │   │       ├── project_info
  │   │       │   ├── x1.coffee
  │   │       │   ├── x2.html
  │   │       │   ├── x3.coffee
  │   │       │   └── x4.html
  │   │       └── views
  │   │           ├── x5.coffee
  │   │           └── x6.html
  │   ├── README.md
  │   └── talk
  │       └── client
  │           └── views
  │               ├── x7.coffee
  │               ├── x8.html
  │               ├── x9.coffee
  │               ├── x10.html
  │               ├── x11.coffee
  │               ├── x12.html
  │               ├── x13.coffee
  │               ├── x14.html
  │               └── x15.less
  </code></pre>