Fixed up File object to support better parameter options.

File.h

@@ -16,8 +16,8 @@ namespace coreutils {
    class File {
 
     public:
-      File(std::string fileName, int mode, int authority);
-      File(ZString &fileName, int mode = O_RDONLY, int authority = 0664);
+//      File(std::string fileName, int mode, int authority);
+      File(ZString fileName, int mode = O_RDONLY, int authority = 0664);
       ~File();
       void setBufferSize(size_t size);
       int read();