title: Gulp command not found after install
body: <p>I installed gulp(globally) and it looks like it worked because it ran this code:</p>
  
  <pre><code>├── tildify@0.2.0
  ├── interpret@0.3.5
  ├── pretty-hrtime@0.2.1
  ├── deprecated@0.0.1
  ├── archy@0.0.2
  ├── minimist@0.2.0
  ├── semver@2.3.2
  ├── orchestrator@0.3.7 (stream-consume@0.1.0, sequencify@0.0.7, end-of-stream@0.1.5)
  ├── chalk@0.5.1 (escape-string-regexp@1.0.1, ansi-styles@1.1.0, supports-color@0.2.0, strip-ansi@0.3.0, has-ansi@0.1.0)
  ├── gulp-util@2.2.20 (lodash._reinterpolate@2.4.1, dateformat@1.0.8-1.2.3, vinyl@0.2.3, through2@0.5.1, multipipe@0.1.1, lodash.template@2.4.1)
  ├── liftoff@0.12.0 (extend@1.2.1, minimist@0.1.0, resolve@0.7.4, findup-sync@0.1.3)
  └── vinyl-fs@0.3.5 (graceful-fs@3.0.2, lodash@2.4.1, mkdirp@0.5.0, strip-bom@0.3.1, vinyl@0.2.3, through2@0.5.1, glob-watcher@0.0.6, glob-stream@3.1.14)
  </code></pre>
  
  <p>But when I type <code>gulp</code> it says <code>-bash: gulp: command not found</code></p>
  
  <p>Any idea what's going on?</p>