0.5.1-pre1, with new code to enable moving the backup GPT data

structures, for the benefit of those who add disks to a RAID array.

gpt.h

@@ -127,6 +127,7 @@ public:
    void BlankPartitions(void);
    void SortGPT(void);
    int ClearGPTData(void);
+   void FixSecondHeaderLocation();
    void SetName(uint32_t partNum, char* theName = NULL);
    void SetDiskGUID(GUIDData newGUID);
    int SetPartitionGUID(uint32_t pn, GUIDData theGUID);