relax SVN archive

Updated the alignment tensor init() unit test to match the new structure.

Updated the matrix_angles() and svd() functions for the new alignment tensor structure.

Updated the generic_fns.align_tensor.align_data_exists() method for the new data structure.

The AlignTensorData instance is now passed into the set() function.

This also fixes a bug in the setting of the Euler angles as they were previously placed in the
dictionary object and not the AlignTensorData object.

Allowed the alignment tensor name structure 'name' to be modifiable.

Bug fix for the alignment tensor unit tests. AlignTensorData initialisation requires a tensor name!

The generic_fns.align_tensor.init() function now initialises the alignment tensor structure properly.

Recreated the AlignTensorData.__init__() method to allow the tensor name to be set.

Wrote the AlignTensorList class for storing all of the alignment tensors for a single data pipe.

Removed the empty AlignTensorData.__init__() method and shifted its docstring to that of the class.