relax SVN archive

The py_type is now set for the minimisation parameters.

Fixes for the specific API param list object.

The add() method now checks that the py_type is given, and the 'select' and 'fix' parameters are now
correctly added.

Renamed 'param_set' to 'set' in the specific API param list object.

Split the specific API param obj loop() method into two.

The new base_loop() method loops over the parameter names according to set, whereas the loop()
method now supports and returns the error and simulation parameter names as well, if set.

The specific API param list object now sets up a number of spin params and min params.

The spin 'select' and 'fixed' parameters are set up in the __init__() method, whereas the
add_min_data() method will be used to add minimisation parameters.

Added the 'scope' arg to the specific API param list add() method.

This will be used to merge the GLOBAL_PARAMS and SPIN_PARAMS lists into one.

Created the specific API param list loop() method for looping over parameter names.

All the get_*() methods of the specific API parameter list objects now call self.check_param().

This new check_param() method raises a RelaxError if the parameter is unknown.

The parameter set 'params' or 'generic' can now be specified in the specific API parameter lists.

Big fix for the auto-generated GUI user functions - the recycling of pages should now work.

The recycling of user function pages was failing due to the wizard _exec_count data structure. A
click on the 'ok' button increments these counts, and a subsequent _ok() call was then suppressing
the execution of the user function. The GUI tests were missing this, as the _ok() call was
bypassed by calling on_execute() instead.