[gtk-mac-bundler] (12 commits) ...Merge Lukas Oberhuber's improvements into master.

[John Ralls <jralls src gnome org>]

Summary of changes:

  b66747e... Move runtest.py to top directory so that relative imports i
  fd55369... libraries: support @loader_path
  c1a66f0... copy_icon_themes: fix list of copied binaries
  e59dc3e... Copy .svg icons after all
  47fefb4... [tests] Correct location of Carbon framework, provide requi
  720a0c2... [tests] Repair and improve testing the launcher script elem
  f701023... [tests] Modernize test of plist handler to reflect earlier 
  3faa363... [Project] Raise an exception if the bundle file has no root
  70eafa6... [Project] Raise an exception if there's an empty launcher t
  8fb70fd... Raise an exception if bundler tries to get a node without s
  abca390... [tests] Replace the broken element names for mandatory elem
  b895aa4... Merge Lukas Oberhuber's improvements into master.