relax SVN archive

Small whitespace fix.

The pipe_control.structure.main.check_structure() checking object now accepts the pipe_name argument.

This allows structural data to be checked for in different data pipes without having to switch to
them.

The pipe_control.structure.main functions translate() and rotate() now accept the pipe_name argument.

This is used to translate and rotate structures in different data pipes, as required by the
structure.align user function.

Implemented the structure.align user function backend.

This is similar to the structure.superimpose user function, however the coordinate data structure
only contains atoms which are in common to all structures.

Modified the Structure.test_align system test so that translations and rotations match the algorithm.

This allows the output of the structure.align user function to be checked to see if the rotation
matrix and translation vector found match that used to shift the original structures.

Extended the Structure.test_align system test to throughly check the structural data.

This includes changing the structure.align user function call to use 'fit to first' and carefully
checking the new atomic coordinates.

Fix for the pipes argument for the structure.align user function in the GUI.

Whitespace fixes for the lib.arg_check module.

Modified the lib.arg_check.is_int_list() function to accept the list_of_lists Boolean argument.

This updates the function to have the same functionality as is_str_list(), allows for lists of lists
of int to be checked.

Registered the new user function argument type 'int_list_of_lists' in the prompt UI.

This is to allow for lists of lists of integers, as used for the model argument in the new
structure.align user function.