relax SVN archive

RDC errors can now be read separately and independently from the data values.

Allowed the data column to be None in the rdc.read() user function.

This allows a file containing only errors to be read.

Added a print out to the centre() function.

The calculated paramagnetic centre is now being placed into the current data pipe.

Added a missing import and fixed an incorrect reference to the data pipe container.

Shifted the calculation of the paramagnetic centre from __minimise_setup_pcs() to centre().

The data pipe arg is now accepted by the centre() function.

Added the pipe arg to the pcs.centre() user function.

Wrote the num_data_points() method for determining n.

Wrote the model_statistics() method.