Add PRINT messages, disallow_end_turn messages

Add more reminding PRINT messages, disallow_end_turn messages, and fix a bug where player can just capture village and end turn without recruiting/recalling units.

data/campaigns/tutorial/scenarios/02_Tutorial_part_2.cfg

@@ -382,16 +382,31 @@ A full list of abilities and weapons specials, along with traits, may be found i
             [/show_if]
         [/message]
 
+        [if]
+            [not]
+                [have_location]
+                    terrain=^V
+                [/have_location]
+            [/not]
+            [then]
                 [message]
                     speaker=Galdrad
                     message= _ "While none of your recruited units can move yet, you still can. You need more income; there are some villages near the keep you can capture."
                 [/message]
 
                 {PRINT ( _ "Capture a village")}
+
+                [disallow_end_turn]
+                    reason=_"You still have to capture a village!"
+                [/disallow_end_turn]
+            [/then]
+        [/if]
     [/event]
 
     [event]
         name=capture
+        first_time_only=no
+
         [filter]
             side=1
         [/filter]
@@ -400,6 +415,24 @@ A full list of abilities and weapons specials, along with traits, may be found i
 
         # NOTE: maybe give live income stats?
 
+        [if]
+            [not]
+                [have_unit]
+                    side=1
+                    race=elf
+                    count=5
+                [/have_unit]
+            [/not]
+            [then]
+                {PRINT ( _ "You forgot to recruit troops! You can press <b>u</b> to undo your last move.")}
+
+                [disallow_end_turn]
+                    reason=_"You still have to recruit troops!"
+                [/disallow_end_turn]
+
+                [allow_undo] [/allow_undo]
+            [/then]
+            [else]
                 [message]
                     speaker=Galdrad
                     message= _ "Excellent! As Delfador mentioned earlier, each captured village will support one unit and provide you with 1 extra gold per turn."
@@ -426,6 +459,14 @@ A full list of abilities and weapons specials, along with traits, may be found i
                     name=side 1 turn end
                     {CLEAR_PRINT}
                 [/event]
+            [/else]
+        [/if]
+
+        [on_undo]
+            {CLEAR_PRINT}
+
+            {PRINT ( _ "Recruit or recall your troops")}
+        [/on_undo]
     [/event]
 
     [event]