* rename cdbus header include guards to use CDBUS_ instead of LASH_DBUS_
* remove dbus/error.h and dbus/error.c
error.h contained lash/ladish specific error strings and
lash_dbus_error() prototype. lash_dbus_error() is renamed to
cdbus_error() and its implementation is moved to dbus/method.c. The
D-Bus error strings that have DBUS_ERROR_XXX matches are removed and
their uses are switched to the libdbus variants. The ladish specific
error strings are moved to dbus_constants.h
../conf.c:153:7: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
../jmcore.c:214:7: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
../daemon/cmd_save_project.c:45:8: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
../daemon/main.c:288:7: warning: variable 'ret' set but not used [-Wunused-but-set-variable]