relax SVN archive

Split the _bmrb_model_map() method into two as it was not functioning correctly as was too complex.

The two new methods are _from_bmrb_name() and _to_bmrb_name().

Removed a mention to SRLS from the http://nmr-relax.com pages.

Deleted the SRLS analysis type - there is no incentive to develop this part of relax.

Deleted the ancient TODO file, as it is no longer relevant.

Improved the RelaxWarning for the reading of NMRView peaks with missing assignments.

This is in response to bug #17876 (http://gna.org/bugs/?17876) submitted by Elio Cino <herfworm att
gmail dot com>.

Fixes for the units tests of relax_data.back_calc() as the args can now be None.

Fix for the BMRB system test which was broken due to the restructuring of the sample_scripts directory.

Added a sample script for the unsuccessful two domain N-state model optimisation.

Added two sample scripts for determining the populations of an ensemble of small molecules.

This uses RDCs and PCSs with the N-state model to study the dynamics of small organic molecules.

Created a sample script subdirectory called n_state_model.