Bundle essentially all admin messages. Send bundles at the beginning of new call to mapper_admin_poll(), or when the bundle count >= 20 (perhaps we should use lo_bundle_length() instead, but count is cheaper).
Corrected implementation of admin message bundling: since liblo doesn't copy the path strings in lo_bundle_add_message() we bundle messages with arbitrary paths, but we can bundle messages that conform to standard libmapper admin messages.
Alphabetized admin message enum and string array.
Merge branch 'master' into admin-bundles
Merge branch 'master' into admin-bundles
Merge branch 'master' into admin-bundles

Conflicts:
	src/monitor.c
Use lo_send_bundle_from()
Merge branch 'master' into admin-bundles
Only add addr argument if admin has device.
Free device server last so that /logout message bundle sends properly.