send priority instrumentation message on startup with version info

pkg/analysis_server/lib/src/analysis_server.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library analysis.server;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analysis_server/src/analysis_logger.dart';
@@ skipping 44 matching lines @@
 
   const AnalysisDoneReason._(this.text);
 }
 
 
 /**
  * Instances of the class [AnalysisServer] implement a server that listens on a
  * [CommunicationChannel] for analysis requests and process them.
  */
 class AnalysisServer {
+
+  // Replaced during build with AnalysisServer version
+  static final String VERSION = '0.0.1';
+
   /**
    * The channel from which requests are received and to which responses should
    * be sent.
    */
   final ServerCommunicationChannel channel;
 
   /**
    * The [ResourceProvider] using which paths are converted into [Resource]s.
    */
   final ResourceProvider resourceProvider;
@@ skipping 1002 matching lines @@
    * [packageUriResolver].
    */
   SourceFactory _createSourceFactory(UriResolver packageUriResolver) {
     List<UriResolver> resolvers = <UriResolver>[
         new DartUriResolver(analysisServer.defaultSdk),
         new ResourceUriResolver(resourceProvider),
         packageUriResolver];
     return new SourceFactory(resolvers);
   }
 }