Added dependency injection and blur event

Hi, this pull request contains the following changes:

• added dependency injection for "$timeout" and "uiCodemirrorConfig" to uiCodemirrorDirective
• fixed a typo ("codemirrot" -> "codemirror")
• emit HTML "blur" event when codemirror instance loses focus (this is required, for example, to update ngModel on blur through ngModelOptions)

Thanks!