relax SVN archive

Removed some references to residues, as these should be spins.

Fix for the consistency testing calculate() method - the frequency check was incorrect.

Fixes for the test_calc() consistency testing system test for the new design.

Some fixes for the consistency testing calculate() method.

Create the specific base class method _sim_pack_relax_data() for packing relaxation data.

This is the method from specific_fns/model_free/main.py, shifted into api_common. The J(w) mapping
and consistency testing code now use this base method as well.

The Dasha system test is now thoroughly checking all of the relax data store.

Updated all of the Dasha module for the new relax data ID string design.

Created a new function called num_frq() for determining the number of frequencies.

Alphabetical ordering of functions in the relax_data module.

The model-free sim_pack_data() now converts the sim_data structure into a dictionary with Rx IDs.