File system path resolving

include/AdblockPlus/DefaultFileSystem.h

-#ifndef ADBLOCKPLUS_DEFAULT_FILE_SYSTEM_H
-#define ADBLOCKPLUS_DEFAULT_FILE_SYSTEM_H
+#ifndef ADBLOCK_PLUS_DEFAULT_FILE_SYSTEM_H
+#define ADBLOCK_PLUS_DEFAULT_FILE_SYSTEM_H
 
 #include "FileSystem.h"
+
+#ifdef _WIN32
+#define PATH_SEPARATOR '\\'
+#else
+#define PATH_SEPARATOR '/'
+#endif
 
 namespace AdblockPlus
 {
   class DefaultFileSystem : public FileSystem
   {
   public:
     std::tr1::shared_ptr<std::istream> Read(const std::string& path) const;
     void Write(const std::string& path,
                std::tr1::shared_ptr<std::ostream> data);
     void Move(const std::string& fromPath,
                       const std::string& toPath);
     void Remove(const std::string& path);
     StatResult Stat(const std::string& path) const;
     std::string Resolve(const std::string& path) const;
+    void SetBasePath(const std::string& path);
+  protected:
+    std::string basePath;
+
 
   };
 }
 
 #endif