Clarified Obsolete Message 1

The obsolete only made sense for AsterNET source code veterans. Changed to make sense for users instead.

Asterisk.2013/Asterisk.NET/Manager/Event/AbstractAgentVariables.cs

@@ -18,7 +18,7 @@ namespace AsterNET.Manager.Event
 		/// Get/Set the variables to set on the queue call in native asterisk format.<br/>
 		/// Example: "VAR1=abc|VAR2=def".
 		/// </summary>
-        [Obsolete("Don't use this anymore - the delimiter is not server context aware", true)]
+		[Obsolete("Use GetVariables and SetVariables instead.", true)]
 		public string Variable
 		{
 			get { return null; /* return Helper.JoinVariables(variables, Common.GET_VAR_DELIMITER(this.Server), "="); */ }