Added id during Window creation so that it remembers window size and position

Joe Marini just wrote a blog post where he describes few shortcomings of this App at http://joemarini.blogspot.fr/2013/11/tools-for-developing-on-chromeos.html.

One of them is the fact that the Text App doesn't remember the window position or size.
By simply specifying an ID during the window creation process, the Chrome App Position and Size will be remembered auto-magically ;) 
See http://developer.chrome.com/apps/app_window.html#method-create
Always focus Text App when a file is opened
Added suggested name when saving an Untitled file
Added support for multiple languages
Removed localized App Name support and addressed feedback
Fixed some nits in README.md
Removed i18n-options from i18n-template
Added Display Path on title and tab hover
Saved open files and reopened
Forgot this part somehow
Fixed appWindow ID for multiple created windows
Addressed Oleg's feedback
Added missed )