* dbus/dbus-types.h: add dbus_unichar

	* dbus/dbus-internals.c (_dbus_verbose): use _dbus_getenv

	* dbus/dbus-connection.c (dbus_connection_send_message): return
	TRUE on success

	* dbus/dbus-transport.c: include dbus-watch.h

	* dbus/dbus-connection.c: include dbus-message-internal.h

	* HACKING: add file with coding guidelines stuff.

	* dbus/dbus-string.h, dbus/dbus-string.c: Encapsulate all string
	handling here, for security purposes (as in vsftpd). Not actually
	using this class yet.

	* dbus/dbus-sysdeps.h, dbus/dbus-sysdeps.c: Encapsulate all
	system/libc usage here, as in vsftpd, for ease of auditing (and
	should also simplify portability). Haven't actually moved all the
	system/libc usage into here yet.