Adding interface to manipulate with TGeoMatrixes.

Adding interface to manipulate with TGeoMatrixes.
Used in residual minimization, and for visualization
Used in the FitAlignCombined.C macros

+  //
+  // Alignment manipulation using TGeoMatrix
+
+  void SetAlignGlobal(const TGeoMatrix * matrixGlobal);
+  void SetAlignSectors(const TObjArray *arraySector);
+  TGeoMatrix* GetAlignGlobal() const  {return fMatrixGlobal;}
+  TObjArray * GetAlignSectors() const {return fArraySector;}
+  //
+  static AliTPCCalibGlobalMisalignment*  CreateOCDBAlign();
+  static AliTPCCalibGlobalMisalignment*  CreateMeanAlign(const AliTPCCalibGlobalMisalignment *alignIn);
+  static void DumpAlignment( AliTPCCalibGlobalMisalignment* align, TTreeSRedirector *pcstream, const char *name);