relax SVN archive

White space fixes.

The user function arg type of 'num' is now handled as a float in the auto-generated GUI elements.

The height_desc user function page variable is now properly handled.

It was not being passed into the Uf_page initialisation!!

The wizard height_desc variable can now be set in the auto-generated user functions.

This is via the wizard_height_desc variable.

Some more keyword arg fixes for the Bmrb.test_bmrb_rw GUI test.

Fixes for the GUI tests.

The 'name' argument was converted to 'uf_name' as 'name' already exists as an argument in many user
functions. A number of keyword args were also added, as these are required for the execute_uf GUI
test method.

The user function data object add_class() and add_uf() methods now check for uniqueness.

This is to catch coding errors whereby the user function class or name has been duplicated.

Removed the now useless 'functions' module.

The Bmrb.test_bmrb_rw GUI test is now complete and fully uses the new auto-generated user functions.

This test will only pass once all the relevant user functions are converted to the auto-generation
design!

The 2D sequence args of the auto-generated GUI user functions now matches the normal sequence elements.

The String_list_of_lists_window has been converted to Sequence_window_2D which inherits from
Sequence_window. All Python types and sequences supported by the Sequence GUI element are now
supported by the Sequence_2D element (which is the old String_list_of_lists).