relax SVN archive

Modified the __init__() method and spun of some code into __init_iso_cone_elements().

Wrote the minimise() and __unpack_opt_results() methods.

The minimise() method is rudimentary and will not work.

Modifications to the __update_model() method.

Some fixed for the grid_search() method.

Added the __update_model() method.

Wrote the select_model() method.

Registered the Frame Order user function class into the interpreter.

Created the Frame Order user function class.

The only user function yet available is frame_order.select_model().

Implemented most of the grid_search() method.

Added the Frame Order type to get_string().