title: karma plugin dependencies not being found
body: <p>When I run <code>karma start</code> I get the following issues</p>
  
  <pre><code>C:\devl\JS\myProject&gt;karma start
  06 09 2015 11:30:19.133:WARN [plugin]: Cannot find plugin "karma-chrome-launcher
  ".
    Did you forget to install it ?
    npm install karma-chrome-launcher --save-dev
  06 09 2015 11:30:19.149:WARN [plugin]: Cannot find plugin "karma-firefox-launche
  r".
    Did you forget to install it ?
    npm install karma-firefox-launcher --save-dev
  06 09 2015 11:30:19.159:WARN [plugin]: Cannot find plugin "karma-ie-launcher".
    Did you forget to install it ?
    npm install karma-ie-launcher --save-dev
  </code></pre>
  
  <p>when I do <code>npm list</code> I can see the dependencies at the bottom of the tree</p>
  
  <pre><code>├─┬ karma-chrome-launcher@0.2.0
  │ ├─┬ fs-access@1.0.0
  │ │ └── null-check@1.0.0
  │ └─┬ which@1.1.1
  │   └─┬ is-absolute@0.1.7
  │     └── is-relative@0.1.3
  ├── karma-firefox-launcher@0.1.6
  ├─┬ karma-ie-launcher@0.2.0
  │ └── lodash@3.10.1
  └── karma-jasmine@0.3.6
  </code></pre>
  
  <p>I have tried nuking my node_dependencies and running <code>npm install</code> again and i'm not sure what else to try</p>
  
  <p>EDIT: I have verified in my node_dependencies directory and the plugin directories are in there.</p>