IOSAD-63 trying to use yml2 for PEPMessage

yml2/pEp_message.yml2

@@ -0,0 +1,13 @@
+decl class +name;
+decl property(name, type, nullability, key);
+
+class PEPMessage {
+    property "messageID" type = "NSString *" key="id";
+    property "direction" type = "PEP_msg_direction" key="outgoing";
+    property "shortMessage" type = "NSString *" key="shortmsg";
+    property "longMessage" type = "NSString *" key="longmsg";
+    property "longMessageFormatted" type = "NSString *" key="longmsg_formatted";
+    property "attachments" type = "NSArray *" key="attachments";
+    property "sent" type = "NSDate *" key="sent";
+    property "received" type = "NSDate *" key="recv";
+}

yml2/pEp_message_include.ysl2

@@ -0,0 +1,38 @@
+include yslt.yml2
+
+tstylesheet {
+  template "/" {
+    apply "class", 0
+  }
+
+  template "class" {//document "{@name}Base.h" {
+    | //
+    | //  «@name».h
+    | //  pEpObjCAdapter
+    | //
+    | //  Created by Dirk Zimmermann on 10.11.17.
+    | //  Copyright © 2017 p≡p. All rights reserved.
+    | //
+    |
+    | #import <Foundation/Foundation.h>
+    |
+    | #import "PEPSessionProtocol.h"
+    |
+    | @interface PEPIdentity : NSObject
+    |
+    apply "property"
+    |
+    |
+    | @end
+  }
+
+  template "property" {
+    choose {
+      when "@nullability"
+        | @property (nonatomic, «@nullability») «@type» «@name»;
+      otherwise
+        | @property (nonatomic) «@type» «@name»;
+    }
+  }
+}
+