Added Mac OS X resource file handling:

Added Mac OS X resource file handling:
  - rez wxMac library resources into a rsrc file in the lib directory
  - derez the previous rsrc file into an ascii file in the lib directory
  - rez the ascii file into the executables as needed
  - mark executables with application creator code APPL
Compiling the resources into a file in the lib directory avoids dependencies
on the wxMac resource sources when creating executables. However, decompiling
and recompiling could be avoided if resource merging worked (ResMerger?).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@9962 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775