Update project ember to 1.8.1

libgrabber updated project ember to 1.8.1.

@components

### Metadata information

```json
{
  "metadata": {
    "packageManager": "bower",
    "name": "ember",
    "repo": "emberjs/ember.js",
    "files": {
      "include": ["ember.js", "ember.min.js", "ember.prod.js"],
      "exclude": []
    },
    "path": "/home/jsdelivr/files/emberjs",
    "localVersions": ["1.2.0", "1.4.0", "1.5.0", "1.5.1", "1.6.1", "1.7.0", "1.8.0-beta.1", "1.8.0-beta.4", "1.8.0"],
    "remoteVersions": ["1.0.0-pre", "1.0.0-pre.2", "1.0.0-pre.4", "1.0.0-rc.1", "1.0.0-rc.2", "1.0.0-rc.3", "1.0.0-rc.4", "1.0.0-rc.5", "1.0.0-rc.6", "1.0.0-rc.6.1", "1.0.0-rc.7", "1.0.0-rc.8", "1.0.0", "1.0.1", "1.1.0-beta.1", "1.1.0-beta.2", "1.1.0-beta.4", "1.1.0", "1.1.1", "1.1.2", "1.1.3", "1.2.0-beta.1", "1.2.0-beta.2", "1.2.0-beta.3", "1.2.0-beta.4", "1.2.0", "1.2.1", "1.2.2", "1.3.0-beta.1", "1.3.0-beta.2", "1.3.0-beta.3", "1.3.0-beta.4", "1.3.0", "1.3.1", "1.3.2", "1.4.0-beta.1", "1.4.0-beta.2", "1.4.0-beta.3", "1.4.0-beta.4", "1.4.0-beta.5", "1.4.0-beta.6", "1.4.0", "1.5.0-beta.1", "1.5.0-beta.2", "1.5.0-beta.3", "1.5.0-beta.4", "1.5.0", "1.5.1", "1.6.0-beta.1", "1.6.0-beta.2", "1.6.0-beta.3", "1.6.0-beta.4", "1.6.0-beta.5", "1.6.0", "1.6.1", "1.7.0-beta.1", "1.7.0-beta.2", "1.7.0-beta.3", "1.7.0-beta.4", "1.7.0-beta.5", "1.7.0", "1.7.1", "1.8.0-beta.1", "1.8.0-beta.2", "1.8.0-beta.3", "1.8.0-beta.4", "1.8.0-beta.5", "1.8.0", "1.8.1"],
    "branchVersions": ["1.8.0-beta.5"]
  },
  "version": "1.8.1",
  "updated": true,
  "updatePath": "/home/jsdelivr/files/emberjs/1.8.1",
  "branch": "ember/1.8.1"
}
```