Rather than generating enum classes by hand (and complaining in each
file that "this should really be standard"), use glib-mkenums.
Unfortunately, we need a very new version of glib-mkenums in order to
deal with NM's naming conventions and to fix a few other bugs, so just
import that into the source tree temporarily.
Also, to simplify the use of glib-mkenums, import Makefile.glib from
https://bugzilla.gnome.org/654395.
To avoid having to run glib-mkenums for every subdirectory of src/,
add a new "generated" directory, and put the generated enums files
there.
Finally, use Makefile.glib for marshallers too, and generate separate
ones for libnm-glib and NetworkManager.
Massive fixup of libnm-glib to:
a) have all objects (with the exception of VPN) cache their properties and
update them asynchronously on PropertiesChanged signals from NM
b) return internal const data for most attributes/properties instead of
allocated values that the caller must free
c) cache wrapped objects such that a given D-Bus path will always map to the
same GObject returned by libnm-glib
d) remove a few signals and move them to GObject property notifications
e) match recent NM D-Bus API changes for activation/deactivation
f) remove some private functions from libnm-glib headers
git-svn-id: http://svn-archive.gnome.org/svn/NetworkManager/trunk@3491 4912f4e0-d625-0410-9fb7-b9a5a253dbdc
