Remove some .obsolete files.
Merge branch 'master' of https://github.com/macoslib/macoslib

# Via Charles (2) and declaresub (2)
* 'master' of https://github.com/macoslib/macoslib:
  Add .obsolete to .gitignore.
  Refactor NSWindow to remove use of now private NSObject property.
  Refactor  NSURL.PathExtension.
  Add Romanian localizations for a few menu items.
  Move Cocoa MenuItems out of Cocoa into Additional Modules.
Merge pull request #60 from declaresub/master

Remove some .obsolete files.