relax SVN archive

Added geometric parameters to the align_tensor.display() print out.

Added the rhombicity R and asymmetry eta parameters to the alignment tensor object.

Renamed the rotation matrix back to 'rotation'.

This is because R will be used as the 'R' alignment tensor parameter.

Added the anisotropic Aa and rhombic Ar parameters to the alignment tensor object.

Fixes for the alignment tensor unit tests (due to object renaming).

N-state model fix for the alignment tensor object renaming.

Cut and paste bug fix for the alignment tensor diagonalisation function calc_A_diag().

Alphabetical reordering of the functions.

Expanded the alignment tensor object.

The 'tensor' and 'tensor_diag' objects are no more. New structures include:
A
A_5D
A_diag
eigvals
S
S_5D
S_diag
P
P_5D
P_diag

'Aii_unit', where i is one of x, y, or z has been renamed to 'unit_i'. 'rotation' has been renamed
to 'R'.

Additional modifications to the alignment tensor print out to show more information.