Cache all of the X atoms we use at startup.

Do this instead of querying for them every time we use them. This
removes an XXX that has been in there since time began. This will become
more important as we move towards supporting netwm.

ok todd@, okan@.

calmwm.c

@@ -74,10 +74,12 @@ main(int argc, char **argv)
 	bzero(&Conf, sizeof(Conf));
 	conf_setup(&Conf, conf_file);
 	client_setup();
+	xu_getatoms();
 	x_setup();
 	Starting = 0;
 
 	xev_init();
+
 	XEV_QUICK(NULL, NULL, MapRequest, xev_handle_maprequest, NULL);
 	XEV_QUICK(NULL, NULL, UnmapNotify, xev_handle_unmapnotify, NULL);
 	XEV_QUICK(NULL, NULL, ConfigureRequest,