Email verification code (#1382)

* Base verification code implementation, must define command, manager, events
* VerificationManager, verification command and messages, handled some sensible commands, configuration values
* Improved manager and sensible commands trigger
* Updated messages
* Updated verification code manager, fixed tests
* Switched to a permission based command
* Verification manager and command improved and added tests
* Edited messages

src/main/java/fr/xephi/authme/process/logout/AsynchronousLogout.java

@@ -1,5 +1,6 @@
 package fr.xephi.authme.process.logout;
 
+import fr.xephi.authme.data.VerificationCodeManager;
 import fr.xephi.authme.data.auth.PlayerAuth;
 import fr.xephi.authme.data.auth.PlayerCache;
 import fr.xephi.authme.datasource.DataSource;
@@ -26,6 +27,9 @@ public class AsynchronousLogout implements AsynchronousProcess {
     @Inject
     private PlayerCache playerCache;
 
+    @Inject
+    private VerificationCodeManager codeManager;
+
     @Inject
     private SyncProcessManager syncProcessManager;
 
@@ -52,6 +56,7 @@ public class AsynchronousLogout implements AsynchronousProcess {
         }
 
         playerCache.removePlayer(name);
+        codeManager.unverify(name);
         database.setUnlogged(name);
         database.revokeSession(name);
         syncProcessManager.processSyncPlayerLogout(player);