relax SVN archive

Fixes for the __update_model() method.

The probabilities and Euler angle parameter arrays are only created for the relevant N-state model.

Fix for the func_population() method.

The RDC errors are now set to 1.0 if no errors are supplied, converting the chi2 value to a SSE
value.

Fix for the average_rdc_5D() function. The unit XH bond vector indecies were still in Mathematica format.

Implemented the core of the func_population() method.

Renamed the invalid variable name 5D_vector to vector_5D.

Imported some of the RDC functions.

Created maxA() for finding the maximal alignment or the Azz component in the alignment frame.

Fixes for the to_tensor() function. The tensor was completely wrong.

Modified the to_tensor() to be more efficient by working only with numpy arrays.

Created the to_5D() function for converting from matrix form to 5D vector form.