now can package ipa, still problems with signing

public/tier2/ifilesystem.h

@@ -27,6 +27,9 @@ public:
 	IFileSystem *m_pFileSystem;
 };
 
+abstract_class IDirectoryHandle
+{
+};
 
 //----------------------------------------------------------------------------
 // IFileSystem is an app system which manages files, could have different 
@@ -53,6 +56,10 @@ public:
 	// Leaks memory
 	// Should be cleaned by the user
 	virtual const char *ReadString( IFileHandle *pFile ) = 0;
+	
+	// Directory stuff
+	virtual IDirectoryHandle *OpenDir( const char *szDirName ) = 0;
+	virtual void CloseDir( IDirectoryHandle *pDir ) = 0;
 
 	IFileSystem *m_pNext;