Common file interface class, RageBasicFile, shared by RageFile
and RageFileObj. This makes most uses of these objects interchangeable.
RageFile is now just a simple wrapper for RageFileObj, to create
files in FILEMAN's namespace; file objects can also be created
independently. This means that, for example, IniFile can be used
to write a file to a CString, without having to jump through hoops,
and without having to use a separate file access wrapper; just do
something like:
RageFileObjMem string_file;
ini.WriteFile( string );
const CString &sString = string_file.GetString();