Document the getSourceReport rpc in service.md. Bump version to 3.1.

runtime/vm/service.cc

 // Copyright (c) 2013, 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.
 
 #include "vm/service.h"
 
 #include "include/dart_api.h"
 #include "include/dart_native_api.h"
 #include "platform/globals.h"
 
@@ skipping 3468 matching lines @@
 static const MethodParameter* get_version_params[] = {
   NO_ISOLATE_PARAMETER,
   NULL,
 };
 
 
 static bool GetVersion(Thread* thread, JSONStream* js) {
   JSONObject jsobj(js);
   jsobj.AddProperty("type", "Version");
   jsobj.AddProperty("major", static_cast<intptr_t>(3));
-  jsobj.AddProperty("minor", static_cast<intptr_t>(0));
+  jsobj.AddProperty("minor", static_cast<intptr_t>(1));
   jsobj.AddProperty("_privateMajor", static_cast<intptr_t>(0));
   jsobj.AddProperty("_privateMinor", static_cast<intptr_t>(0));
   return true;
 }
 
 
 class ServiceIsolateVisitor : public IsolateVisitor {
  public:
   explicit ServiceIsolateVisitor(JSONArray* jsarr)
       : jsarr_(jsarr) {
@@ skipping 366 matching lines @@
     const ServiceMethodDescriptor& method = service_methods_[i];
     if (strcmp(method_name, method.name) == 0) {
       return &method;
     }
   }
   return NULL;
 }
 
 
 }  // namespace dart