Add smart folder for localized files (Info.plist, MainMenu.xib)

[letiemble]

It would be great to have a similar structure as in Xcode where localized files have one child node per language.

The file structure is reversed:

English.lproj +-> MainMenu.xib
French.lproj +-> MainMenu.xib

appears as:

MainMenu.xib
+-> English
+-> French