relax SVN archive

Many of the functions of the specific_analyses.n_state_model.data module relating to alignment
tensors, RDC data and PCS data have been shifted in to the pipe_control package modules
align_tensor, rdc, and pcs respectively. This allows these functions to be made more general and
allow the code to be shared with the frame order analysis or any future analysis using such data,
and hence remove some code duplication.