Issue 116 - Document the libadblockplus API

include/AdblockPlus/AppInfo.h

 /*
  * This file is part of Adblock Plus <http://adblockplus.org/>,
  * Copyright (C) 2006-2014 Eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 #ifndef ADBLOCK_PLUS_APP_INFO_H
 #define ADBLOCK_PLUS_APP_INFO_H
 
 #include <string>
 
 namespace AdblockPlus
 {
+  /**
+   * Information about the app using libadblockplus.
+   */
   struct AppInfo
   {
+    /**
+     * Optional unique ID of the app.
+     * @deprecated This field is not used anywhere, and will be removed.
+     */
     std::string id;
+
+    /**
+     * Current version of the app, in
+     * [Mozilla toolkit version format](https://developer.mozilla.org/en/docs/Toolkit_version_format).
+     */
     std::string version;
+
+    /**
+     * Technical name of the app (not user visible).
+     */
     std::string name;
+
+    /**
+     * Technical name of the platform the app is running on (not user visible).
+     */
     std::string application;
+
+    /**
+     * Current version of the platform the app is running on.
+     */
     std::string applicationVersion;
+
+    /**
+     * Locale to use, as a
+     * [Mozilla locale code](https://wiki.mozilla.org/L10n:Locale_Codes).
+     */
     std::string locale;
+
+    /**
+     * Whether the app is a development build, the default is `false`.
+     */
     bool developmentBuild;
 
     AppInfo() : developmentBuild(false) {}
   };
 }
 
 #endif