gtk-mac-bundler can't access the executable's rpath list so it can't
follow dependencies if they're not in $install_dir/lib from @rpath.
Autotools always sets absolute path install names so this should have no
adverse affects on other Mac builds.
Instead of building libgncmod-app-utils-python as a stand-alone library
because gncmod-app-utils.c can be compiled only with guile thanks to
declaring scm_init_sw_app_utils_module. Linux linkers will just mark it
'U' but the MacOS linker errors out.
It is split into
- /libgnucash (for the non-gui bits)
- /gnucash (for the gui)
- /common (misc source files used by both)
- /bindings (currently only holds python bindings)
This is the first step in restructuring the code. It will need much
more fine tuning later on.
