Add command to initiate garbage collection

shell/src/Main.cpp

 #include <AdblockPlus.h>
 #include <fstream>
 #include <iostream>
 #include <sstream>
 
+#include "GcCommand.h"
 #include "HelpCommand.h"
 #include "SubscriptionsCommand.h"
 #include "MatchesCommand.h"
 
 namespace
 {
   class LibFileReader : public AdblockPlus::FileReader
   {
   public:
     std::auto_ptr<std::istream> Read(const std::string& path) const
@@ skipping 40 matching lines @@
 {
   try
   {
     LibFileReader fileReader;
     CerrErrorCallback errorCallback;
     AdblockPlus::JsEngine jsEngine(&fileReader, 0);
     jsEngine.Load("adblockplus_compat.js");
     jsEngine.Load("adblockplus.js");
 
     CommandMap commands;
+    Add(commands, new GcCommand(jsEngine));
     Add(commands, new HelpCommand(commands));
     Add(commands, new SubscriptionsCommand(jsEngine));
     Add(commands, new MatchesCommand());
 
     std::string commandLine;
     while (ReadCommandLine(commandLine))
       {
         std::string commandName;
         std::string arguments;
         ParseCommandLine(commandLine, commandName, arguments);
@@ skipping 10 matching lines @@
             std::cout << error.what() << std::endl;
           }
       }
   }
   catch (const std::exception& e)
   {
     std::cerr << "Exception: " << e.what() << std::endl;
   }
   return 0;
 }