feature request: `fileGroups` and groups

[vladimirleonidovich]

A snippet of my specification:

fileGroups:
  - Base.lrpoj/Info.plist

I expect Info.plist to be in the root of my project in the project navigator, but XcodeGen creates a new group called Base.lproj.

Would it be possible to add more control over what XcodeGen will generate?