Make checkpoints required by default (#273)

Author: Panzerhandschuh

fgd/brush/trigger/zone_timer_stage.fgd

@@ -4,7 +4,7 @@
 	stage_name(string) : "Stage Name" : : "A custom name for this stage (optional)."
 	filter_name(filterclass) : "Filter Name" : : "filter_activator entity to use for this zone."
 	stage_number(integer) : "Stage Number" : 2 : "The stage number of this zone. NOTE: 1 is reserved for start! 2+ are free for your stage zones, so start at 2!"
-	checkpoints_required(boolean) : "Checkpoints Required" : 0 : "Is the player required to activate all checkpoints before progressing to the next stage? Otherwise, checkpoint zones may be skipped for this stage."
+	checkpoints_required(boolean) : "Checkpoints Required" : 1 : "Is the player required to activate all checkpoints before progressing to the next stage? Otherwise, checkpoint zones may be skipped for this stage."
 	checkpoints_ordered(boolean) : "Checkpoints Ordered" : 1 : "Do the checkpoints in this segment have a logical order, even if the player is not required to activate them all?"
 	limit_ground_speed(boolean) : "Limit ground speed" : 1 : "Limit ground speed to walking speed (prevents bunny hopping)."
 	safe_height(float) : "Safe Height" : -1 : "Height that the player must be under to start a run of this stage track. Safe height is not a factor in activating the stage when running the full main track. -1 = full zone, 0 = base of zone, > 0 = custom height."