Rewrite AppDomain to handle uncaughts & promises

Dragonfly.js

@@ -133,7 +133,19 @@ class Dragonfly
 		else
 		{
 			// Send to master to prevent multiple process competing to write into the handler
-			this.logHandler = { write: function( e ) { process.send({ cmd: "dragonLog", data: e }); } };
+			this.logHandler = {
+				write: function( e ) {
+					process.send(
+						{ cmd: "dragonLog", data: e }
+						, ( er ) => {
+							if( er )
+							{
+								console.log( er.code, e );
+							}
+						}
+					);
+				}
+			};
 		}
 
 		var tag = cluster.isMaster ? "M" : "S";