Core/Commands: Add new spy command (#1263)

Add a new spy command for game masters and administrators to receive all conversations of followed players.

How to use:

- Use command .spy follow <characterName> with a GM 
- Make that player whisper another player
- You (GM) should receive the message sent
- Use command .spy status. You should get a list with the test subject's name in it.
- Use command .spy unfollow <characterName>
- You should not receive any more messages sent or received by that player


* Core/Commands: Add new spy command
* Importing pending sql
* Fix missing comma in SQL
* Fix travis compile: comment unused parameter

src/server/game/Miscellaneous/Language.h

@@ -1146,7 +1146,19 @@ enum TrinityStrings
     LANG_COMMAND_MUTEHISTORY_EMPTY      = 5060,
     LANG_COMMAND_MUTEHISTORY_OUTPUT     = 5061,
 
-    // Room for more Trinity strings      5062-9999
+    // Spy command
+    LANG_COMMAND_SPY_FOLLOWING           = 5062,
+    LANG_COMMAND_SPY_UNFOLLOW            = 5063,
+    LANG_COMMAND_SPY_ALREADY_FOLLOWED_BY = 5064,
+    LANG_COMMAND_SPY_FOLLOWING_GROUP     = 5065,
+    LANG_COMMAND_SPY_UNFOLLOW_GROUP      = 5066,
+    LANG_COMMAND_SPY_NOT_FOLLOWING_GROUP = 5067,
+    LANG_COMMAND_SPY_CLEARED             = 5068,
+    LANG_COMMAND_SPY_LIST                = 5069,
+    LANG_COMMAND_SPY_WHISPERS_PLAYER     = 5070,
+    LANG_COMMAND_SPY_TELLS_GROUP         = 5071,
+
+    // Room for more Trinity strings      5072-9999
 
     // Level requirement notifications
     LANG_SAY_REQ                        = 6604,