relax SVN archive

Modified the N-state model methods to set the alignment tensor parameter rather Saupe order matrix.

Modified the display() function to allow all alignment tensors to be displayed.

Allowed the align_tensor.display() arg to be None (to display all tensors).

Set the 2-domain N-state model gradient and Hessian methods to None.

Fixes for the test___disassemble_param_vector() unit test.

Added a test to __disassemble_param_vector() to set if the model has been selected.

Fixed the test___assemble_param_vector() unit test.

Added a test to see if the model has been selected.

Fixes for all the N-state model unit tests.

Changed the PCS scaling factor.