relax SVN archive

A number of changes for the MF_grid_command class.

process_results() has been absorbed into run(), the data required for the grid search is passed into
the class upon initialisation, and the call to minfx.generic_minimise() has been switched to a call
to minfx.grid() to correspond to the minfx library changes.

The normal grid search has been activated using MF_grid_command.

The diffusion tensor sub-grid algorithm might need a MF_subgrid_command class.

Comment removal to match the main 1.3 line.

Removed the unneeded 2nd initialisation of the Mf class during back-calculation.

Eliminated the silence flag in all classes.

This can be reinstated later, if necessary, solely by the diffusion tensor grid search.

Absorbed initial_printout() into run() in the MF_minimise_command class.

Added a run() method to the MF_grid_command class and removed the dummy initial_printout() method.

Modified initial_printout() to match the main 1.3 line code.

Simplification of the model-free target function class initialisation.

This has been shifted back into specific_fns/model_free/mf_minimise.py! This does not need to be
done by the multi-processing code. Silencing can be performed later by modifying the 'verbosity'
variable in this class.

Import fixes. Minfx is only used in multi_processor_commands!