Added comments and license to pref mgr.

Removed sampling from track overlay.

MyTracks/src/com/google/android/apps/mytracks/services/PreferenceManager.java

@@ -1,5 +1,25 @@
+/*
+ * Copyright 2010 Google Inc.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
 package com.google.android.apps.mytracks.services;
 
+/**
+ * A class that manages reading the shared preferences for the service.
+ * 
+ * @author Sandor Dornbush
+ */
 import android.content.SharedPreferences;
 import android.util.Log;