Fix for the extract() method. The current data pipe was missing.
Fixed the creation of the Dasha script.
Fixes for the copy() and read() functions.
The specific set() function was destroyed at r4822, well at least shifted to generic_fns.value.set_spin_params().
Converted the extract() function to the new design.
Converted the execute() function to the new design.
Created the 2 new API functions: first_residue_num() and last_residue_num().
Converted the create_script() function to the new design.
Converted the create() function to the new design.
Fixes for the Dasha user function print outs.
Missing import bug fix.
This was identified by the arg unit tests of 7597.