relax SVN archive

Fixes for the J(w) mapping set_selected_sim() method.

The spin index and not spin container is passed into the method.

Changed the instance arg to model_index in the model-free set_selected_sim() method.

Fix for the set_selected_sim() method, the args were back to front.

Fixed a call to minimise.reset_min_stats().

Bug fix, removed a now non-existent reference to 'self'.

Converted the generic_fns.value.read() function to the new design.

Converted the read() class method into a module function.

This completes the conversion of all class methods to functions.

Modified the write_data() function to use write_header() and write_line() from generic_fns.sequence.

Modified write_header() to write extra columns as well.

Added the ability to have extra columns written by write_line().