pkg/isolate: library renaming, removed unused method, fix creation of TimeoutException

lib/src/raw_receive_port_multiplexer.dart

Index: lib/src/raw_receive_port_multiplexer.dart
diff --git a/lib/src/multiplexport.dart b/lib/src/raw_receive_port_multiplexer.dart
similarity index 95%
rename from lib/src/multiplexport.dart
rename to lib/src/raw_receive_port_multiplexer.dart
index 2711c45752e21c874ecf72b10b560f4d26a18878..d5cd25e73cbdf94c0fccdd9858c18e4ce482c87a 100644
--- a/lib/src/multiplexport.dart
+++ b/lib/src/raw_receive_port_multiplexer.dart
@@ -18,14 +18,15 @@
 /// write `new RawReceivePort(handler)`.
 ///
 /// Remember to [close] the multiplexer when it is no longer needed.
-/// `
+///
 /// (TODO: Check if it really is faster - creating a receive port requires a
 /// global mutex, so it may be a bottleneck, but it's not clear how slow it is).
-library pkg.isolate.multiplexreceiveport;
+library isolate.raw_receive_port_multiplexer;
+
+import 'dart:collection';
+import 'dart:isolate';
 
-import "dart:isolate";
-import "dart:collection";
-import "lists.dart";
+import 'lists.dart';
 
 class _MultiplexRawReceivePort implements RawReceivePort {
   final RawReceivePortMultiplexer _multiplexer;