Simple localization

Please add identifiers for each menu item. This allows to translate an application without change some system files by using a simple plug-in with 'Main.sublime-menu' file. For example:

[

  { 

    "id": "file", 
     "caption": "Файл" // for Russian 

  }

]

or 

[

  { 

    "id": "file", 
    "caption": "Fichier" // for French 

  }

]