Fixed sqlite trigger, member exist error message & issue #16.

Change-Id: If00402734bf7ce71fa699eee9e7609ea83203191
diff --git a/core/Changes b/core/Changes
index f1cb067..0ad7a54 100644
--- a/core/Changes
+++ b/core/Changes
@@ -2,7 +2,8 @@
 13/03/2018
 	- removed old policy and deprecated code (margaretha)
 	- moved authentication related code to /full (margaretha)
-	- elaborated default layer names in the configuration file. (margaretha)
+	- elaborated default layer names in the configuration file (margaretha)
+	- added GROUP_DELETED status code (margaretha)
 
 version 0.59.10 
 20/02/2018
@@ -13,7 +14,7 @@
 	- updated library versions and java environment (margaretha)
 	- added status codes (margaretha)
 	- moved validation.properties (margaretha)
-	- fixed unrecognize media-type application/json (margaretha)
+	- fixed unrecognized media-type application/json (margaretha)
 	
 version 0.59.9 	
 08/11/2017
diff --git a/core/src/main/java/de/ids_mannheim/korap/exceptions/StatusCodes.java b/core/src/main/java/de/ids_mannheim/korap/exceptions/StatusCodes.java
index 941b5af..f32fb89 100644
--- a/core/src/main/java/de/ids_mannheim/korap/exceptions/StatusCodes.java
+++ b/core/src/main/java/de/ids_mannheim/korap/exceptions/StatusCodes.java
@@ -88,6 +88,7 @@
     public static final int GROUP_MEMBER_NOT_FOUND = 603;
     public static final int INVITATION_EXPIRED = 604;
     public static final int GROUP_NOT_FOUND = 605;
+    public static final int GROUP_DELETED = 606;
     
 
 //    public static final int ARGUMENT_VALIDATION_FAILURE = 700;