Add meaningful trace to createDummyInstance error handling

Closes #30

src/org/swiftsuspenders/injectionpoints/ConstructorInjectionPoint.as

@@ -86,7 +86,11 @@ package org.swiftsuspenders.injectionpoints
 			}
 			catch (error : Error)
 			{
-				trace(error);
+				trace('Exception caught while trying to create dummy instance for constructor ' +
+						'injection. It\'s almost certainly ok to ignore this exception, but you ' +
+						'might want to restructure your constructor to prevent errors from ' +
+						'happening. See the SwiftSuspenders documentation for more details. ' +
+						'The caught exception was:\n' + error);
 			}
 			constructorNode.setChildren(describeType(clazz).factory.constructor[0].children());
 		}