deactivate invitation spam

enzevalos_iphone/StudySettings.swift

@@ -24,7 +24,7 @@ import KeychainAccess
 
 class StudySettings {
     static let allAvailableParameters: [StudyParameterProtocol.Type] = [SecurityIndicator.self, Warning.self, Inviation.self]
-    static var parameters: [StudyParameterProtocol.Type] = [SecurityIndicator.self] {
+    static var parameters: [StudyParameterProtocol.Type] = [] {
         didSet{
             securityIndicator = SecurityIndicator.load() as! SecurityIndicator
             invitationsmode = Inviation.load() as! Inviation
@@ -42,7 +42,7 @@ class StudySettings {
     
     public static var invitationEnabled: Bool {
         get {
-            return true
+            return false
         }
     }