relax SVN archive

Removed a debugging print statement.

Started to pass data into maths_fns.n_state_model.N_state_opt.

Docstring fix for the linear_constraints() method.

Updated the linear_constraints() method.

The looping over all model parameters is not necessary as constraints only apply to the probs.

Whitespace clean up.

Wrote the param_num() method.

Modified the linear_constraints() method to call param_num() to get the number of params.

Fixed the check, in minimise(), that the N-state model has been set up.

Simplified the model_setup() method. The data_init() call and pipe type checking was unnecessary.

Wrote the model_setup() method, although more code may be necessary.