Fix tests on 64-bit systems with the -test-lib64 patch.
    
    - Add -emacs-iedit patch to adapt to recent iedit changes.
    - Build with auto-complete, company-mode, and caml-mode support.
    - Add subpackages: dot-merlin-reader, emacs-merlin, and vim-merlin.
    - Generate autoloads for the Emacs interface.