Implement method to verify and  write torrent files and  file manifests to disk.
Also add some helper methods to file manifest and torrent file get add useful info encapsulated
in the name. Lastly fixed an apart bug in load_directory helper related to files from
boost::directory_iterator being in an arbitrary rather than  lexicographical order.

Change-Id: I8a2c2f3224caec65cf97a418785778234a0d4d73
diff --git a/src/torrent-manager.hpp b/src/torrent-manager.hpp
index ca83a2b..fc790a8 100644
--- a/src/torrent-manager.hpp
+++ b/src/torrent-manager.hpp
@@ -28,7 +28,6 @@
 #include <ndn-cxx/data.hpp>
 
 #include <boost/filesystem/fstream.hpp>
-#include <boost/utility.hpp>
 
 #include <functional>
 #include <memory>
@@ -41,7 +40,7 @@
 namespace ndn {
 namespace ntorrent {
 
-class TorrentManager : boost::noncopyable {
+class TorrentManager : noncopyable {
   /**
    * \class TorrentManager
    *
@@ -93,9 +92,34 @@
 
  protected:
   bool writeData(const Data& packet);
-  // Write the Data packet to disk, return 'true' if data successfully written to disk 'false'
-  // otherwise. Behavior is undefined unless the corresponding file manifest has already been
-  // downloaded.
+  /*
+   * \brief Write @p packet composed of torrent date to disk.
+   * @param packet The data packet to be written to the disk
+   * Write the Data packet to disk, return 'true' if data successfully written to disk 'false'
+   * otherwise. Behavior is undefined unless the corresponding file manifest has already been
+   * downloaded.
+  */
+
+  bool writeTorrentSegment(const TorrentFile& segment, const std::string& path);
+  /*
+   * \brief Write the @p segment torrent segment to disk at the specified path.
+   * @param segment The torrent file segment to be written to disk
+   * @param path The path at which to write the torrent file segment
+   * Write the segment to disk, return 'true' if data successfully written to disk 'false'
+   * otherwise. Behavior is undefined unless @segment is a correct segment for the torrent file of
+   * this manager and @p path is the directory used for all segments of this torrent file.
+   */
+
+  bool writeFileManifest(const FileManifest& manifest, const std::string& path);
+  /*
+   * \brief Write the @p manifest file manifest to disk at the specified @p path.
+   * @param manifest The file manifest  to be written to disk
+   * @param path The path at which to write the file manifest
+   * Write the file manifest to disk, return 'true' if data successfully written to disk 'false'
+   * otherwise. Behavior is undefined unless @manifest is a correct file manifest for a file in the
+   * torrent file of this manager and @p path is the directory used for all file manifests of this
+   * torrent file.
+   */
 
   void onDataReceived(const Data& data);