relax SVN archive

The back calculated data is now written out to file in the synthetic relaxation data script.

The 'bc' arg is now part of the value.write() user function, and all of the return_value functions.

The arg is also propagated to the back-end of the relax_data.write() user function.

Added the argument 'bc' to the relax_data.write() user function front end.

This currently doesn't do anything.

Added the relaxation data.

The relaxation data is now for 500 and 900 MHz.

This larger difference should hopefully speed up optimisation in the test suite.

Fixes to the relaxation data generation sample script based on the changes of r13851.

Fixes for the test suite relaxation data creation script.

The code was not fully compatible with the relax 1.3 design.

Added initial support for determining protein connectivities in the internal structural reader.

This is currently only for intra-residue connectivities in the protein backbone. A number of new
methods have been added:
_mol_type()
_protein_connect()
_protein_intra_connect()

Converted the relaxation data generation script from relax 1.0 format to relax 1.3.

Created the PDB representation of the spherical vector distribution for 9 vectors.