relax SVN archive

Added unit tests regarding model.py and its functions.

Removed the unit test regaring model.py in test_variables.py.

Parted the file of variables.py into model.py.

Copied variables.py to model.py.

There should not exist any functions in variables.py.

variables.py should only consist of hardcoded variables, and the functions related to model sorting and nesting is split into its own file.

Modified in documentation, that the "No Rex" model have one chemical exchange site. Namely itself.

Added a "check" function, what will determine if R1 data is missing for a model to analyse.

Also added corresponding unit tests, to test the functionality.

Split the unit test of specific_analyses.relax_disp.checks.get_times() into its own unit test file.

Fix for correct English, replacing "where" with "whereby".

Renamed the parameter "r1_fit" to "r1".

This naming fits better to all other parameters.

Renamed R1rho off resonance models where R1 is fitted.

This removes the "underscore".
This is a better representation presented to the user, for example in the GUI model
selection list or the relax_disp.select_model user function in all UI.