relax SVN archive

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!

Whitespace fix.

Clean up of the code before and after minfx execution.

This includes a number of simplifications. pre_command_feed_back() is now called
initial_printout(). post_command_feedback() has been deleted. This was for a kludge which can be
avoided by setting the minfx printout arg to zero. The calls to set_generic_pre_and_post_amble()
and set_grid_pre_and_post_amble() were part of this kludge and are eliminated. The self.silence
flag is now used to silence printouts when desired.

Deleted the useless post_run() method.